The following table contains brief descriptions of the parameters provided for each source in the WISE Preliminary Data Release Single-Exposure Source Working Database. The table is organized according to the broad function and utility of the parameters: positional information, photometric information, and source quality information. For Working Database flag parameters, the meaning of each possible flag value is given, along with some practical information on their usage.
The columns in the following table are:
| Column Name | Format | Units | nulls | Description | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic Position and Identification Information | ||||||||||||||
| ra | %10.6f | deg | no | J2000 right ascension with respect to the 2MASS PSC reference frame. | ||||||||||
| dec | %10.6f | deg | no | J2000 declination with respect to the 2MASS PSC reference frame. CAUTION: Approximately 20% of sources fainter than W1~14.5 mag in the Preliminary Release Single-exposure Source Database suffer from a source extraction software error that resulted in their declinations being offset between 0.2 and 1.0 arcsec from the true position. An increasingly smaller fraction exhibit this effect to magnitudes as bright as W1~13.0 mag. The declination uncertainties (sigdec) for all Database entries have been inflated by adding 0.5" in quadrature to the pure extraction measurement uncertainty to reflect the realized distribution of declination errors. See I.4.b for further information. | ||||||||||
| sigra | %4.2f | arcsec | no | One-sigma uncertainty in right ascension coordinate. | ||||||||||
| sigdec | %4.2f | arcsec | no | One-sigma uncertainty in declination coordinate.
CAUTION: The declination uncertainty is overestimated for the majority of sources in the Preliminary Release Source Catalog. Sigdec was computed by adding 0.5 arcsec in quadrature to the extraction measurement uncertainty to reflect the impact of the declination bias error known to affect a fraction of source fainter than W1~13.0 mag. The value of 0.5 arcsec was selected so the median absolute deviation (MAD) of the declination difference between 2MASS and WISE positions for the faint half of cross-identified sources have the value 0.6745σ expected for a Gaussian. See I.4.b for further information. | ||||||||||
| sigradec | %3d | arcsec | no | The co-sigma of the equatorial position uncertainties, sig_ra, sig_dec (σα, σδ). The co-sigma is related to the covariance between the position errors Vαδ by the formula Vαδ = σαδ|σαδ|. This maintains the sign information for the correlation, since σαδ may be negative. It is more natural to carry the co-sigma along with the other uncertainties instead of the covariance because the former is in the same units as the other uncertainties. | ||||||||||
| glon | %7.3f | deg | no | Galactic longitude. CAUTION: This coordinate should not be used as an astrometric reference. | ||||||||||
| glat | %7.3f | deg | no | Galactic latitude. CAUTION: This coordinate should not be used as an astrometric reference. | ||||||||||
| elon | %7.3f | deg | no | Ecliptic longitude. CAUTION: This coordinate should not be used as an astrometric reference. | ||||||||||
| elat | %7.3f | deg | no | Ecliptic latitude. CAUTION: This coordinate should not be used as an astrometric reference. | ||||||||||
| w1x | %8.3f | pix | no | The x-pixel coordinate of this source on the W1 Single-Exposure Image. | ||||||||||
| w1y | %8.3f | pix | no | The y-pixel coordinate of this source on the W1 Single-Exposure Image. | ||||||||||
| w2x | %8.3f | pix | no | The x-pixel coordinate of this source on the W2 Single-Exposure Image. | ||||||||||
| w2y | %8.3f | pix | no | The y-pixel coordinate of this source on the W2 Single-Exposure Image. | ||||||||||
| w3x | %8.3f | pix | no | The x-pixel coordinate of this source on the W3 Single-Exposure Image. | ||||||||||
| w3y | %8.3f | pix | no | The y-pixel coordinate of this source on the W3 Single-Exposure Image. | ||||||||||
| w4x | %8.3f | pix | no | The x-pixel coordinate of this source on the W4 Single-Exposure Image. | ||||||||||
| w4y | %8.3f | pix | no | The y-pixel coordinate of this source on the W4 Single-Exposure Image. | ||||||||||
| cntr | %10d | ---- | no | Unique identification number for the Working Database source.
This number is formed entirely from the source_id,
which is in turn formed from the scan_id,
frame_num and source number, src.
On average sources with cntr values close to each other are also
close to each other on the sky, except at image boundaries.
Cntr ordering thus provides a useful mapping of the WISE release
on storage media.
The cntr value is formed by making the source_id
into an integer, in the format:
SSSSSssMMMIIIIII, where
For example, a source in the scan 04381b, frame number 057, with a source_id of 04381b057-012345, would have a cntr value of 438101057012345. |
||||||||||
| source_id | %28s | ---- | no | Unique source identifier. Source_id has the general form SSSSSxMMM-IIIIII, where | ||||||||||
| frame_num | %3d | ---- | no | Number of the frameset on which this source was extracted. The
identifier has the general form MMM, a zero-filled
three-digit number.
The frameset number is computed based on time bins which count from the scan start time: where
For example, a frame with a start time 1234 secs after the scan start time would have a frame number of 124. N.B.
|
||||||||||
| scan_id | %6s | ---- | no | Scan identifier. This is a six character string that identifies a block of
survey exposures that are acquired between two flight system maneuvers,
such as reorientation of the instrument boresight near the ecliptic poles,
or slews to acquire TDRSS for data downlink contacts. Because
maneuvers often take place near the ecliptic poles, the scan number
is roughly associated with a half-orbit's worth of images. However,
scans can cover less or more than half of the arc between ecliptic poles.
The scan_id has the general form SSSSSx, where
The first scan whose data are used in the Preliminary Data Release is scan 00936a. This was the first scan after the NEP crossing in the 468th WISE orbit. The final scan included in the Release is 04125a, the first scan after the SEP crossing in the 2062nd WISE orbit. |
||||||||||
| src | %6d | ---- | no | Sequential number of this source in the Single-Exposure frameset from which it was extracted, in approximate descending order of W1 source brightness. | ||||||||||
| Primary Photometric Information | ||||||||||||||
| w1mpro | %7.3f | mag | yes | W1 magnitude measured with profile-fitting photometry, or the magnitude of the 95% confidence brightness upper limit if the W1 flux measurement has SNR<2. This column is null if the source is nominally detected in W1, but no useful brightness estimate could be made. | ||||||||||
| w1sigmpro | %5.3f | mag | yes | W1 profile-fit photometric measurement uncertainty in mag units. This column is null if the W1 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable. | ||||||||||
| w1snr | %7.1f | ---- | yes | W1 profile-fit measurement signal-to-noise ratio. This value is the ratio of the flux (w1flux to flux uncertainty (w1sigflux)in the W1 profile-fit photometry measurement. This column is null if w1flux is negative, or if w1flux or w1sigflux are null. | ||||||||||
| w1rchi2 | %9.3e | ---- | yes | Reduced χ2 of the W1 profile-fit photometry measurement. This column is null if the W1 magnitude is a 95% confidence upper limit (i.e. the source is not detected). | ||||||||||
| w2mpro | %7.3f | mag | yes | W2 magnitude measured with profile-fitting photometry, or the magnitude of the 95% confidence brightness upper limit if the W2 flux measurement has SNR<2. This column is null if the source is nominally detected in W1, but no useful brightness estimate could be made. | ||||||||||
| w2sigmpro | %5.3f | mag | yes | W2 profile-fit photometric measurement uncertainty in mag units. This column is null if the W2 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable. | ||||||||||
| w2snr | %7.1f | ---- | yes | W2 profile-fit measurement signal-to-noise ratio. This value is the ratio of the flux (w2flux to flux uncertainty (w2sigflux)in the W2 profile-fit photometry measurement. This column is null if w2flux is negative, or if w2flux or w2sigflux are null. | ||||||||||
| w2rchi2 | %9.3e | ---- | yes | Reduced χ2 of the W2 profile-fit photometry measurement. This column is null if the W2 magnitude is a 95% confidence upper limit (i.e. the source is not detected). | ||||||||||
| w3mpro | %7.3f | mag | yes | W3 magnitude measured with profile-fitting photometry, or the magnitude of the 95% confidence brightness upper limit if the W3 flux measurement has SNR<2. This column is null if the source is nominally detected in W3, but no useful brightness estimate could be made. | ||||||||||
| w3sigmpro | %5.3f | mag | yes | W3 profile-fit photometric measurement uncertainty in mag units. This column is null if the W3 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable. | ||||||||||
| w3snr | %7.1f | ---- | yes | W3 profile-fit measurement signal-to-noise ratio. This value is the ratio of the flux (w3flux to flux uncertainty (w3sigflux)in the W3 profile-fit photometry measurement. This column is null if w3flux is negative, or if w3flux or w3sigflux are null. | ||||||||||
| w3rchi2 | %9.3e | ---- | yes | Reduced χ2 of the W3 profile-fit photometry measurement. This column is null if the W3 magnitude is a 95% confidence upper limit (i.e. the source is not detected). | ||||||||||
| w4mpro | %7.3f | mag | yes | W4 magnitude measured with profile-fitting photometry, or the magnitude of the 95% confidence brightness upper limit if the W4 flux measurement has SNR<2. This column is null if the source is nominally detected in W4, but no useful brightness estimate could be made. | ||||||||||
| w4sigmpro | %5.3f | mag | yes | W4 profile-fit photometric measurement uncertainty in mag units. This column is null if the W4 profile-fit magnitude is a 95% confidence upper limit or if the source is not measurable. | ||||||||||
| w4snr | %7.1f | ---- | yes | W4 profile-fit measurement signal-to-noise ratio. This value is the ratio of the flux (w4flux to flux uncertainty (w4sigflux)in the W4 profile-fit photometry measurement. This column is null if w4flux is negative, or if w4flux or w4sigflux are null. | ||||||||||
| w4rchi2 | %9.3e | ---- | yes | Reduced χ2 of the W4 profile-fit photometry measurement. This column is null if the W4 magnitude is a 95% confidence upper limit (i.e. the source is not detected). | ||||||||||
| rchi2 | %9.3f | ---- | yes | Combine reduced χ2 of the profile-fit photometry measurement in all bands. | ||||||||||
| nb | %1d | ---- | yes | Number of PSF components used simultaneously in the profile-fitting for this source. This number includes the source itself, so the minimum value of nb is "1". Nb is greater than "1" when the source is fit concurrently with other nearby detections (passive deblending), or when a single source is split into two components during the fitting process (active deblending). | ||||||||||
| na | %1d | ---- | yes | Active deblending flag. Active deblending was not performed during Scan/frame source extraction. Therefore, this column is always zero for Single-exposure Source Database entries. | ||||||||||
| w1sat | %5.3f | ---- | yes | Saturated pixel fraction, W1. The fraction of all pixels within the profile-fitting area of this source that are flagged as saturated. A value larger than 0.0 indicates one or more pixels of saturation. Saturation begins to occur for point sources brighter than [W1]~8 mag. Saturation may occur in fainter sources because of a charged particle strike. | ||||||||||
| w2sat | %5.3f | ---- | yes | Saturated pixel fraction, W2. The fraction of all pixels within the profile-fitting area of this source that are flagged as saturated. A value larger than 0.0 indicates one or more pixels of saturation. Saturation begins to occur for point sources brighter than [W2]~7 mag. Saturation may occur in fainter sources because of a charged particle strike. | ||||||||||
| w3sat | %5.3f | ---- | yes | Saturated pixel fraction, W3. The fraction of all pixels within the profile-fitting area of this source that are flagged as saturated. A value larger than 0.0 indicates one or more pixels of saturation. Saturation begins to occur for point sources brighter than [W3]~4 mag. Saturation may occur in fainter sources because of a charged particle strike. | ||||||||||
| w4sat | %5.3f | ---- | yes | Saturated pixel fraction, W4. The fraction of all pixels within the profile-fitting area of this source that are flagged as saturated. A value larger than 0.0 indicates one or more pixels of saturation. Saturation begins to occur for point sources brighter than [W4]~0 mag. Saturation may occur in fainter sources because of a charged particle strike. | ||||||||||
| satnum | %4s | ---- | no | Minimum sample at which saturation occurs in each band. Four character string, one character per band, that indicates the minimum SUTR sample in which any pixel in the profile-fitting area was flagged as having reached the saturation level in the on-board WISE payload processing. If no pixels in a given band are flagged as saturated, the value for that band is "0". | ||||||||||
| Measurement Quality and Source Reliability Information | ||||||||||||||
| cc_flags | %4s | ---- | no | Contamination and confusion flag. Four character string, one character
per band [W1/W2/W3/W4], that indicates that the photometry and/or position
measurements of a source may be contaminated or biased due to proximity
to an image artifact.
CAUTION: Non-zero cc_flags values in any band are an indicator that the Database entry may be a spurious detection, or if it is a real source that its measurements may be contaminated and the photometry should be used with caution. Sources that are flagged as spurious detections of artifacts have not been removed from the Single-Exposure Source Database. The cc_flags value in each band is set in priority order according to the following table, in the event a source is affected by more than one artifact or condition:
Lower-case letters denote instances in which the source detection in a band is believed to be real but the measurement may be contaminated by the artifact. Upper-case letters are instances in which the source detection in a band may be a spurious detection of an artifact. A source extraction may be affected by more than one type of artifact. The full tally of artifacts affecting a source in each band is given in the w?cc_map and w?cc_map_str columns. |
||||||||||
| det_bit | %3d | ---- | no | Bit encoded integer indicating bands in which a source has a w?snr>2 detection. For example, a source detected in W1 only has det_bit=1 (binary 0001). A source detected in W4 only has det_bit=8 (binary 1000). A source detected in all four bands has det_bit=15 (binary 1111). | ||||||||||
| ph_qual | %4s | ---- | no | Photometric quality flag. Four character flag, one character per band [W1/W2/W3/W4], that provides a shorthand summary of the quality of the profile-fit photometry measurement in each band, as derived from the measurement signal-to-noise ratio.
|
||||||||||
| sso_flg | %1d | ---- | yes | Solar system object association flag. This is a
single digit flag that indicates if the source is positionally
associated with the predicted position of a known asteroid, comet,
planet or planetary satellite at the time when
this frameset was acquired by WISE.
CAUTION: An sso_flg="1" entry does not necessarily mean that this Single-exposure database entry is a WISE detection of a solar system object. The majority of Database entries associated with solar system objects are chance alignments between the predicted object position and either an inertial background source or a spurious WISE detection. Only approximately 30% of flagged associations are actual solar system object detections. See the NEOWISE Moving Object Tracklets for the vetted list of both previously known and WISE-discovered solar system detections. | ||||||||||
| mjd | %12.6f | day | yes | The Modified Julian Date of the mid-point of the frameset exposure. The mid-point is defined as the time the optical boresight crosses the center of the WISE focal planes. This time is the same for all bands, whereas the exposure times in W1 and W2 are different than in W3 and W4. | ||||||||||
| w1frl | %5.3f | ---- | yes | Fraction of pixels affected by latents. This column gives the fraction of all W1 pixels in the W1 Single-Exposure image used to characterize this source that may be affected by the presence of a latent image produced by a bright source. This number is computed by counting the number of pixels in the Single-Exposure Bit Mask images with value "25" that are present within the profile-fitting area, a circular region with radius of 7.25", centered on the position of this source, and dividing by the total number of pixels in the same area that are available for measurement. | ||||||||||
| w2frl | %5.3f | ---- | yes | Fraction of pixels affected by latents. This column gives the fraction of all W2 pixels in the W2 Single-Exposure image used to characterize this source that may be affected by the presence of a latent image produced by a bright source. This number is computed by counting the number of pixels in the Single-Exposure Bit Mask images with value "25" that are present within the profile-fitting area, a circular region with radius of 7.25", centered on the position of this source, and dividing by the total number of pixels in the same area that are available for measurement. | ||||||||||
| w3frl | %5.3f | ---- | yes | Fraction of pixels affected by latents. This column gives the fraction of all W3 pixels in the W3 Single-Exposure image used to characterize this source that may be affected by the presence of a latent image produced by a bright source. This number is computed by counting the number of pixels in the Single-Exposure Bit Mask images with value "25" that are present within the profile-fitting area, a circular region with radius of 7.25", centered on the position of this source, and dividing by the total number of pixels in the same area that are available for measurement. | ||||||||||
| w4frl | %5.3f | ---- | yes | Fraction of pixels affected by latents. This column gives the fraction of all W4 pixels in the W4 Single-Exposure image used to characterize this source that may be affected by the presence of a latent image produced by a bright source. This number is computed by counting the number of pixels in the Single-Exposure Bit Mask images with value '25' that are present within the profile-fitting area, a circular region with radius of 15.0", centered on the position of this source, and dividing by the total number of pixels in the same area that are available for measurement. | ||||||||||
| w1cc_map | %3d | ---- | no | Contamination and confusion map for this source in W1.
This column contains the integer equivalent of the 9-bit binary
array that specifies if the W1 measurement is believed to be
contaminated by or a spurious detection of
an image artifact. The elements of the binary array are:
The leftmost bit, S, differentiates whether the band-detection is believed to be a real detection contaminated by an artifact ("0") or a spurious detection of an artifact ("1"). The remaining bits are set to "1" to denote contamination by different types of artifacts according to the letters:
For example, a measurement that is believed to be a spurious detection of a diffraction spike and scattered light halo has a binary bit map value of "100001001" and w1cc_map=265. |
||||||||||
| w1cc_map_str | %12s | ---- | yes | Contamination and confusion string. This column is a character string
that denotes all artifacts that may contaminate the W1 measurement
of this source, in the priority order D,P,O.
Lower-case letters denote cases where the source detection in this band
is believed to be real but the measurement may be contaminated by the artifact.
Upper-case letters denote cases where the source detection in this band may be
a spurious detection of an artifact.
For example, a real detection that is contaminated by a diffraction spike and a latent (persistent) image has a w1cc_map_str="dp". A spurious detection of a diffraction spike that is also contaminated by a latent image has w1cc_map_str="Dp". This string is "null" if there are no artifacts that affect the measurement in this band. The value that appears in first element of the cc_flags string is the left-most character in w1cc_map_str. If w1cc_map_str is "null", then the corresponding cc_flags entry is "0". |
||||||||||
| w2cc_map | %3d | ---- | no | Contamination and confusion map for this source in W2.
This column contains the integer equivalent of the 9-bit binary
array that specifies if the W2 measurement is believed to be
contaminated by or a spurious detection of
an image artifact. The elements of the binary array are:
The leftmost bit, S, differentiates whether the band-detection is believed to be a real detection contaminated by an artifact ("0") or a spurious detection of an artifact ("1"). The remaining bits are set to "1" to denote contamination by different types of artifacts according to the letters:
For example, a measurement that is believed to be a spurious detection of a diffraction spike and scattered light halo has a binary bit map value of "100001001" and w2cc_map=265. |
||||||||||
| w2cc_map_str | %12s | ---- | yes | Contamination and confusion string. This column is a character string
that denotes all artifacts that may contaminate the W2 measurement
of this source, in the priority order D,P,O.
Lower-case letters denote cases where the source detection in this band
is believed to be real but the measurement may be contaminated by the artifact.
Upper-case letters denote cases where the source detection in this band may be
a spurious detection of an artifact.
For example, a real detection that is contaminated by a diffraction spike and a latent (persistent) image has a w2cc_map_str="dp". A spurious detection of a diffraction spike that is also contaminated by a latent image has w2cc_map_str="Dp". This string is "null" if there are no artifacts that affect the measurement in this band. The value that appears in second element of the cc_flags string is the left-most character in w2cc_map_str. If w2cc_map_str is "null", then the corresponding cc_flags entry is "0". |
||||||||||
| w3cc_map | %3d | ---- | no | Contamination and confusion map for this source in W3.
This column contains the integer equivalent of the 9-bit binary
array that specifies if the W3 measurement is believed to be
contaminated by or a spurious detection of
an image artifact. The elements of the binary array are:
The leftmost bit, S, differentiates whether the band-detection is believed to be a real detection contaminated by an artifact ("0") or a spurious detection of an artifact ("1"). The remaining bits are set to "1" to denote contamination by different types of artifacts according to the letters:
For example, a measurement that is believed to be a spurious detection of a diffraction spike and scattered light halo has a binary bit map value of "100001001" and w3cc_map=265. |
||||||||||
| w3cc_map_str | %12s | ---- | yes | Contamination and confusion string. This column is a character string
that denotes all artifacts that may contaminate the W3 measurement
of this source, in the priority order D,P,O.
Lower-case letters denote cases where the source detection in this band
is believed to be real but the measurement may be contaminated by the artifact.
Upper-case letters denote cases where the source detection in this band may be
a spurious detection of an artifact.
For example, a real detection that is contaminated by a diffraction spike and a latent (persistent) image has a w3cc_map_str="dp". A spurious detection of a diffraction spike that is also contaminated by a latent image has w3cc_map_str="Dp". This string is "null" if there are no artifacts that affect the measurement in this band. The value that appears in first element of the cc_flags string is the third character in w3cc_map_str. If w3cc_map_str is "null", then the corresponding cc_flags entry is "0". |
||||||||||
| w4cc_map | %3d | ---- | no | Contamination and confusion map for this source in W4.
This column contains the integer equivalent of the 9-bit binary
array that specifies if the W4 measurement is believed to be
contaminated by or a spurious detection of
an image artifact. The elements of the binary array are:
The leftmost bit, S, differentiates whether the band-detection is believed to be a real detection contaminated by an artifact ("0") or a spurious detection of an artifact ("1"). The remaining bits are set to "1" to denote contamination by different types of artifacts according to the letters:
For example, a measurement that is believed to be a spurious detection of a diffraction spike and scattered light halo has a binary bit map value of "100001001" and w4cc_map=265. |
||||||||||
| w4cc_map_str | %12s | ---- | yes | Contamination and confusion string. This column is a character string
that denotes all artifacts that may contaminate the W4 measurement
of this source, in the priority order D,P,O.
Lower-case letters denote cases where the source detection in this band
is believed to be real but the measurement may be contaminated by the artifact.
Upper-case letters denote cases where the source detection in this band may be
a spurious detection of an artifact.
For example, a real detection that is contaminated by a diffraction spike and a latent (persistent) image has a w4cc_map_str="dp". A spurious detection of a diffraction spike that is also contaminated by a latent image has w4cc_map_str="Dp". This string is "null" if there are no artifacts that affect the measurement in this band. The value that appears in first element of the cc_flags string is the fourth character in w4cc_map_str. If w4cc_map_str is "null", then the corresponding cc_flags entry is "0". |
||||||||||
| Additional Photometric Information | ||||||||||||||
| w1sky | %9.3f | ---- | yes | The trimmed average of the W1 sky background value in digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70". Both profile-fit and aperture photometry source brightness measurements are made relative to this sky background value. | ||||||||||
| w1sigsk | %7.3f | ---- | yes | The uncertainty in the W1 sky background value in units of digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70". | ||||||||||
| w1conf | %9.3f | ---- | yes | Estimated confusion noise in the W1 sky background annulus, in digital numbers. This number is the difference between the measured noise in the sky background w1sigsk and the noise measured in the same region on the Single-Exposure Uncertainty Maps. | ||||||||||
| w2sky | %9.3f | ---- | yes | The trimmed average of the W2 sky background value in digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70". Both profile-fit and aperture photometry source brightness measurements are made relative to this sky background value. | ||||||||||
| w2sigsk | %7.3f | ---- | yes | The uncertainty in the W2 sky background value in units of digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70". | ||||||||||
| w2conf | %9.3f | ---- | yes | Estimated confusion noise in the W2 sky background annulus, in digital numbers. This number is the difference between the measured noise in the sky background w2sigsk and the noise measured in the same region on the Single Exposure Uncertainty Maps. | ||||||||||
| w3sky | %9.3f | ---- | yes | The trimmed average of the W3 sky background value in digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70". Both profile-fit and aperture photometry source brightness measurements are made relative to this sky background value. | ||||||||||
| w3sigsk | %7.3f | ---- | yes | The uncertainty in the W3 sky background value in units of digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70". | ||||||||||
| w3conf | %9.3f | ---- | yes | Estimated confusion noise in the W3 sky background annulus, in digital numbers. This number is the difference between the measured noise in the sky background w3sigsk and the noise measured in the same region on the Single-Exposure Uncertainty Maps. | ||||||||||
| w4sky | %9.3f | ---- | yes | The trimmed average of the W1 sky background value in digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70". Both profile-fit and aperture photometry source brightness measurements are made relative to this sky background value. | ||||||||||
| w4sigsk | %7.3f | ---- | yes | The uncertainty in the W1 sky background value in units of digital numbers measured in an annulus with an inner radius of 50" and outer radius of 70". | ||||||||||
| w4conf | %9.3f | ---- | yes | Estimated confusion noise in the W1 sky background annulus, in digital numbers. This number is the difference between the measured noise in the sky background w4sigsk and the noise measured in the same region on the Single-Exposure Uncertainty Maps. | ||||||||||
| w1flux | %9.3f | ---- | yes | The "raw" W1 source flux measured in profile-fit photometry in units of digital numbers. This value may be negative. This column is null if no useful profile-fit measurement of the source is possible because of masked or otherwise unusable pixels. | ||||||||||
| w1sigflux | %9.3f | ---- | yes | Uncertainty in the "raw" W1 source flux measurement in profile-fit photometry in units of digital numbers. This column is null if no useful profile-fit measurement of the source is possible. | ||||||||||
| w2flux | %9.3f | ---- | yes | The "raw" W2 source flux measured in profile-fit photometry in units of digital numbers. This value may be negative. This column is null if no useful profile-fit measurement of the source is possible because of masked or otherwise unusable pixels. | ||||||||||
| w2sigflux | %9.3f | ---- | yes | Uncertainty in the "raw" W2 source flux measurement in profile-fit photometry in units of digital numbers. This column is null if no useful profile-fit measurement of the source is possible. | ||||||||||
| w3flux | %9.3f | ---- | yes | The "raw" W3 source flux measured in profile-fit photometry in units of digital numbers. This value may be negative. This column is null if no useful profile-fit measurement of the source is possible because of masked or otherwise unusable pixels. | ||||||||||
| w3sigflux | %9.3f | ---- | yes | Uncertainty in the "raw" W3 source flux measurement in profile-fit photometry in units of digital numbers. This column is null if no useful profile-fit measurement of the source is possible. | ||||||||||
| w4flux | %9.3f | ---- | yes | The "raw" W1 source flux measured in profile-fit photometry in units of digital numbers. This value may be negative. This column is null if no useful profile-fit measurement of the source is possible because of masked or otherwise unusable pixels. | ||||||||||
| w4sigflux | %9.3f | ---- | yes | Uncertainty in the "raw" W1 source flux measurement in profile-fit photometry in units of digital numbers. This column is null if no useful profile-fit measurement of the source is possible. | ||||||||||
| w1mag | %7.3f | mag | yes | W1 "standard" aperture magnitude. This is the
curve-of-growth corrected
source brightness measured in an 8.25" radius circular aperture centered
on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper
limit to the brightness. The background
sky reference level is measured in an annular region with
inner radius of 50" and outer radius of 70". The curve-of-growth
correction is given in w1mcor.
This column is null if an aperture measurement was not possible in W1. |
||||||||||
| w1msigm | %5.3f | mag | yes | Uncertainty in the W1 "standard" aperture magnitude.
This column is null if the W1 "standard" aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w1flg | %3d | ---- | yes |
W1 "standard" aperture measurement quality flag. This flag
indicates if one or more image pixels in the measurement aperture for this
band is confused with nearby objects, is contaminated by saturated
or otherwise unusable pixels, or is an upper limit. The flag value
is an integer that is the combination of
one or more of the following values that signify different conditions:
|
||||||||||
| w1mcor | %6.3f | mag | yes | W1 aperture curve-of-growth correction, in magnitudes. This correction is subtracted from the nominal 8.25" aperture photometry brightness, w1mag, to give the "standard-aperture" magnitude. | ||||||||||
| w2mag | %7.3f | mag | yes | W2 "standard" aperture magnitude. This is the
curve-of-growth corrected
source brightness measured in an 8.25" radius circular aperture centered
on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper
limit to the brightness. The background
sky reference level is measured in an annular region with
inner radius of 50" and outer radius of 70". The curve-of-growth
correction is given in w2mcor.
This column is null if an aperture measurement was not possible in W2. |
||||||||||
| w2msigm | %5.3f | mag | yes | Uncertainty in the W2 "standard" aperture magnitude.
This column is null if the W2 "standard" aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w2flg | %3d | ---- | yes |
W2 "standard" aperture measurement quality flag. This flag
indicates if one or more image pixels in the measurement aperture for this
band is confused with nearby objects, is contaminated by saturated
or otherwise unusable pixels, or is an upper limit. The flag value
is an integer that is the combination of
one or more of the following values that signify different conditions:
|
||||||||||
| w2mcor | %6.3f | mag | yes | W2 aperture curve-of-growth correction, in magnitudes. This correction is subtracted from the nominal 8.25" aperture photometry brightness, w2mag, to give the "standard-aperture" magnitude. | ||||||||||
| w3mag | %7.3f | mag | yes | W3 "standard" aperture magnitude. This is the
curve-of-growth corrected
source brightness measured in an 8.25" radius circular aperture centered
on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper
limit to the brightness. The background
sky reference level is measured in an annular region with
inner radius of 50" and outer radius of 70". The curve-of-growth
correction is given in w3mcor.
This column is null if an aperture measurement was not possible in W3. |
||||||||||
| w3msigm | %5.3f | mag | yes | Uncertainty in the W3 "standard" aperture magnitude.
This column is null if the W3 "standard" aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w3flg | %3d | ---- | yes |
W3 "standard" aperture measurement quality flag. This flag
indicates if one or more image pixels in the measurement aperture for this
band is confused with nearby objects, is contaminated by saturated
or otherwise unusable pixels, or is an upper limit. The flag value
is an integer that is the combination of
one or more of the following values that signify different conditions:
|
||||||||||
| w3mcor | %6.3f | mag | yes | W3 aperture curve-of-growth correction, in magnitudes. This correction is subtracted from the nominal 8.25" aperture photometry brightness, w3mag, to give the "standard-aperture" magnitude. | ||||||||||
| w4mag | %7.3f | mag | yes | W4 "standard" aperture magnitude. This is the
curve-of-growth corrected
source brightness measured in an 16.5" radius circular aperture centered
on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper
limit to the brightness. The background
sky reference level is measured in an annular region with
inner radius of 50" and outer radius of 70". The curve-of-growth
correction is given in w4mcor.
This column is null if an aperture measurement was not possible in W4. |
||||||||||
| w4msigm | %5.3f | mag | yes | Uncertainty in the W4 "standard" aperture magnitude.
This column is null if the W4 "standard" aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w4flg | %3d | ---- | yes |
W4 "standard" aperture measurement quality flag. This flag
indicates if one or more image pixels in the measurement aperture for this
band is confused with nearby objects, is contaminated by saturated
or otherwise unusable pixels, or is an upper limit. The flag value
is an integer that is the combination of
one or more of the following values that signify different conditions:
|
||||||||||
| w4mcor | %6.3f | mag | yes | W4 aperture curve-of-growth correction, in magnitudes. This correction is subtracted from the nominal 16.25" aperture photometry brightness, w4mag, to give the "standard-aperture" magnitude. | ||||||||||
| w1mag_1 | %7.3f | mag | yes | W1 5.5" radius aperture magnitude. This is the
calibrated source brightness measured in a 5.5" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W1. |
||||||||||
| w1msigm_1 | %5.3f | mag | yes | Uncertainty in the W1 5.5" radius aperture magnitude.
This column is null if the the 5.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w1flg_1 | %3d | ---- | yes | W1 5.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w1flg. | ||||||||||
| w2mag_1 | %7.3f | mag | yes | W2 5.5" radius aperture magnitude. This is the
calibrated source brightness measured in a 5.5" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W2. |
||||||||||
| w2msigm_1 | %5.3f | mag | yes | Uncertainty in the W2 5.5" radius aperture magnitude.
This column is null if the the 5.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w2flg_1 | %3d | ---- | yes | W2 5.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w2flg. | ||||||||||
| w3mag_1 | %7.3f | mag | yes | W3 5.5" radius aperture magnitude. This is the
calibrated source brightness measured in a 5.5" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W3. |
||||||||||
| w3msigm_1 | %5.3f | mag | yes | Uncertainty in the W3 5.5" radius aperture magnitude.
This column is null if the the 5.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w3flg_1 | %3d | ---- | yes | W3 5.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w3flg. | ||||||||||
| w4mag_1 | %7.3f | mag | yes | W4 11.0" radius aperture magnitude. This is the
calibrated source brightness measured in a 11.0" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W4. |
||||||||||
| w4msigm_1 | %5.3f | mag | yes | Uncertainty in the W4 11.0" radius aperture magnitude.
This column is null if the the 11.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w4flg_1 | %3d | ---- | yes | W4 11.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w4flg. | ||||||||||
| w1mag_2 | %7.3f | mag | yes | W1 8.25" radius aperture magnitude. This is the
calibrated source brightness measured in a 8.25" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W1. |
||||||||||
| w1msigm_2 | %5.3f | mag | yes | Uncertainty in the W1 8.25" radius aperture magnitude.
This column is null if the the 8.25" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w1flg_2 | %3d | ---- | yes | W1 8.25" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w1flg. | ||||||||||
| w2mag_2 | %7.3f | mag | yes | W2 8.25" radius aperture magnitude. This is the
calibrated source brightness measured in a 8.25" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W2. |
||||||||||
| w2msigm_2 | %5.3f | mag | yes | Uncertainty in the W2 8.25" radius aperture magnitude.
This column is null if the the 8.25" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w2flg_2 | %3d | ---- | yes | W2 8.25" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w2flg. | ||||||||||
| w3mag_2 | %7.3f | mag | yes | W3 8.25" radius aperture magnitude. This is the
calibrated source brightness measured in a 8.25" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W3. |
||||||||||
| w3msigm_2 | %5.3f | mag | yes | Uncertainty in the W3 8.25" radius aperture magnitude.
This column is null if the the 8.25" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w3flg_2 | %3d | ---- | yes | W3 8.25" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w3flg. | ||||||||||
| w4mag_2 | %7.3f | mag | yes | W4 16.5" radius aperture magnitude. This is the
calibrated source brightness measured in a 16.5" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W4. |
||||||||||
| w4msigm_2 | %5.3f | mag | yes | Uncertainty in the W4 16.5" radius aperture magnitude.
This column is null if the the 16.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w4flg_2 | %3d | ---- | yes | W4 16.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w4flg. | ||||||||||
| w1mag_3 | %7.3f | mag | yes | W1 11.0" radius aperture magnitude. This is the
calibrated source brightness measured in a 11.0" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W1. |
||||||||||
| w1msigm_3 | %5.3f | mag | yes | Uncertainty in the W1 11.0" radius aperture magnitude.
This column is null if the the 11.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w1flg_3 | %3d | ---- | yes | W1 11.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w1flg. | ||||||||||
| w2mag_3 | %7.3f | mag | yes | W2 11.0" radius aperture magnitude. This is the
calibrated source brightness measured in a 11.0" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W2. |
||||||||||
| w2msigm_3 | %5.3f | mag | yes | Uncertainty in the W2 11.0" radius aperture magnitude.
This column is null if the the 11.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w2flg_3 | %3d | ---- | yes | W2 11.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w2flg. | ||||||||||
| w3mag_3 | %7.3f | mag | yes | W3 11.0" radius aperture magnitude. This is the
calibrated source brightness measured in a 11.0" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W3. |
||||||||||
| w3msigm_3 | %5.3f | mag | yes | Uncertainty in the W3 11.0" radius aperture magnitude.
This column is null if the the 11.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w3flg_3 | %3d | ---- | yes | W3 11.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w3flg. | ||||||||||
| w4mag_3 | %7.3f | mag | yes | W4 22.0" radius aperture magnitude. This is the
calibrated source brightness measured in a 22.0" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W4. |
||||||||||
| w4msigm_3 | %5.3f | mag | yes | Uncertainty in the W4 22.0" radius aperture magnitude.
This column is null if the the 22.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w4flg_3 | %3d | ---- | yes | W4 22.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w4flg. | ||||||||||
| w1mag_4 | %7.3f | mag | yes | W1 13.75" radius aperture magnitude. This is the
calibrated source brightness measured in a 13.75" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W1. |
||||||||||
| w1msigm_4 | %5.3f | mag | yes | Uncertainty in the W1 13.75" radius aperture magnitude.
This column is null if the the 13.75" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w1flg_4 | %3d | ---- | yes | W1 13.75" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w1flg. | ||||||||||
| w2mag_4 | %7.3f | mag | yes | W2 13.75" radius aperture magnitude. This is the
calibrated source brightness measured in a 13.75" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W2. |
||||||||||
| w2msigm_4 | %5.3f | mag | yes | Uncertainty in the W2 13.75" radius aperture magnitude.
This column is null if the the 13.75" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w2flg_4 | %3d | ---- | yes | W2 13.75" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w2flg. | ||||||||||
| w3mag_4 | %7.3f | mag | yes | W3 13.75" radius aperture magnitude. This is the
calibrated source brightness measured in a 13.75" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W3. |
||||||||||
| w3msigm_4 | %5.3f | mag | yes | Uncertainty in the W3 13.75" radius aperture magnitude.
This column is null if the the 13.75" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w3flg_4 | %3d | ---- | yes | W3 13.75" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w3flg. | ||||||||||
| w4mag_4 | %7.3f | mag | yes | W4 27.5" radius aperture magnitude. This is the
calibrated source brightness measured in a 27.5" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W4. |
||||||||||
| w4msigm_4 | %5.3f | mag | yes | Uncertainty in the W4 27.5" radius aperture magnitude.
This column is null if the the 27.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w4flg_4 | %3d | ---- | yes | W4 27.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w4flg. | ||||||||||
| w1mag_5 | %7.3f | mag | yes | W1 16.5" radius aperture magnitude. This is the
calibrated source brightness measured in a 16.5" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W1. |
||||||||||
| w1msigm_5 | %5.3f | mag | yes | Uncertainty in the W1 16.5" radius aperture magnitude.
This column is null if the the 16.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w1flg_5 | %3d | ---- | yes | W1 16.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w1flg. | ||||||||||
| w2mag_5 | %7.3f | mag | yes | W2 16.5" radius aperture magnitude. This is the
calibrated source brightness measured in a 16.5" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W2. |
||||||||||
| w2msigm_5 | %5.3f | mag | yes | Uncertainty in the W2 16.5" radius aperture magnitude.
This column is null if the the 16.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w2flg_5 | %3d | ---- | yes | W2 16.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w2flg. | ||||||||||
| w3mag_5 | %7.3f | mag | yes | W3 16.5" radius aperture magnitude. This is the
calibrated source brightness measured in a 16.5" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W3. |
||||||||||
| w3msigm_5 | %5.3f | mag | yes | Uncertainty in the W3 16.5" radius aperture magnitude.
This column is null if the the 16.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w3flg_5 | %3d | ---- | yes | W3 16.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w3flg. | ||||||||||
| w4mag_5 | %7.3f | mag | yes | W4 33.0" radius aperture magnitude. This is the
calibrated source brightness measured in a 33.0" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W4. |
||||||||||
| w4msigm_5 | %5.3f | mag | yes | Uncertainty in the W4 33.0" radius aperture magnitude.
This column is null if the the 33.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w4flg_5 | %3d | ---- | yes | W4 33.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w4flg. | ||||||||||
| w1mag_6 | %7.3f | mag | yes | W1 19.25" radius aperture magnitude. This is the
calibrated source brightness measured in a 19.25" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W1. |
||||||||||
| w1msigm_6 | %5.3f | mag | yes | Uncertainty in the W1 19.25" radius aperture magnitude.
This column is null if the the 19.25" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w1flg_6 | %3d | ---- | yes | W1 19.25" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w1flg. | ||||||||||
| w2mag_6 | %7.3f | mag | yes | W2 19.25" radius aperture magnitude. This is the
calibrated source brightness measured in a 19.25" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W2. |
||||||||||
| w2msigm_6 | %5.3f | mag | yes | Uncertainty in the W2 19.25" radius aperture magnitude.
This column is null if the the 19.25" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w2flg_6 | %3d | ---- | yes | W2 19.25" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w2flg. | ||||||||||
| w3mag_6 | %7.3f | mag | yes | W3 19.25" radius aperture magnitude. This is the
calibrated source brightness measured in a 19.25" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W3. |
||||||||||
| w3msigm_6 | %5.3f | mag | yes | Uncertainty in the W3 19.25" radius aperture magnitude.
This column is null if the the 19.25" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w3flg_6 | %3d | ---- | yes | W3 19.25" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w3flg. | ||||||||||
| w4mag_6 | %7.3f | mag | yes | W4 38.5" radius aperture magnitude. This is the
calibrated source brightness measured in a 38.5" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W4. |
||||||||||
| w4msigm_6 | %5.3f | mag | yes | Uncertainty in the W4 38.5" radius aperture magnitude.
This column is null if the the 38.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w4flg_6 | %3d | ---- | yes | W4 38.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w4flg. | ||||||||||
| w1mag_7 | %7.3f | mag | yes | W1 22.0" radius aperture magnitude. This is the
calibrated source brightness measured in a 22.0" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W1. |
||||||||||
| w1msigm_7 | %5.3f | mag | yes | Uncertainty in the W1 22.0" radius aperture magnitude.
This column is null if the the 22.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w1flg_7 | %3d | ---- | yes | W1 22.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w1flg. | ||||||||||
| w2mag_7 | %7.3f | mag | yes | W2 22.0" radius aperture magnitude. This is the
calibrated source brightness measured in a 22.0" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W2. |
||||||||||
| w2msigm_7 | %5.3f | mag | yes | Uncertainty in the W2 22.0" radius aperture magnitude.
This column is null if the the 22.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w2flg_7 | %3d | ---- | yes | W2 22.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w2flg. | ||||||||||
| w3mag_7 | %7.3f | mag | yes | W3 22.0" radius aperture magnitude. This is the
calibrated source brightness measured in a 22.0" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W3. |
||||||||||
| w3msigm_7 | %5.3f | mag | yes | Uncertainty in the W3 22.0" radius aperture magnitude.
This column is null if the the 22.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w3flg_7 | %3d | ---- | yes | W3 22.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w3flg. | ||||||||||
| w4mag_7 | %7.3f | mag | yes | W4 44.0" radius aperture magnitude. This is the
calibrated source brightness measured in a 44.0" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W4. |
||||||||||
| w4msigm_7 | %5.3f | mag | yes | Uncertainty in the W4 44.0" radius aperture magnitude.
This column is null if the the 44.0" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w4flg_7 | %3d | ---- | yes | W4 44.0" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w4flg. | ||||||||||
| w1mag_8 | %7.3f | mag | yes | W1 24.75" radius aperture magnitude. This is the
calibrated source brightness measured in a 24.75" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W1. |
||||||||||
| w1msigm_8 | %5.3f | mag | yes | Uncertainty in the W1 24.75" radius aperture magnitude.
This column is null if the the 24.75" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w1flg_8 | %3d | ---- | yes | W1 24.75" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w1flg. | ||||||||||
| w2mag_8 | %7.3f | mag | yes | W2 24.75" radius aperture magnitude. This is the
calibrated source brightness measured in a 24.75" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W2. |
||||||||||
| w2msigm_8 | %5.3f | mag | yes | Uncertainty in the W2 24.75" radius aperture magnitude.
This column is null if the the 24.75" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w2flg_8 | %3d | ---- | yes | W2 24.75" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w2flg. | ||||||||||
| w3mag_8 | %7.3f | mag | yes | W3 24.75" radius aperture magnitude. This is the
calibrated source brightness measured in a 24.75" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W3. |
||||||||||
| w3msigm_8 | %5.3f | mag | yes | Uncertainty in the W3 24.75" radius aperture magnitude.
This column is null if the the 24.75" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w3flg_8 | %3d | ---- | yes | W3 24.75" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w3flg. | ||||||||||
| w4mag_8 | %7.3f | mag | yes | W4 49.5" radius aperture magnitude. This is the
calibrated source brightness measured in a 49.5" radius circular aperture
centered on the source position on the Single-Exposure Image. If the source is not
detected in the aperture measurement, this is the 95% confidence upper limit
to the brightness. The background sky reference level is measured in an
annular region with inner radius of 50" and outer radius of 70". No
curve-of-growth correction has been applied.
This column is null if an aperture measurement was not possible in W4. |
||||||||||
| w4msigm_8 | %5.3f | mag | yes | Uncertainty in the W4 49.5" radius aperture magnitude.
This column is null if the the 49.5" radius aperture magnitude is an upper limit, or if an aperture measurement was not possible. |
||||||||||
| w4flg_8 | %3d | ---- | yes | W4 49.5" radius aperture magnitude quality flag. This flag indicates if one or more image pixels in the measurement aperture for this band is confused with nearby objects, is contaminated by saturated or otherwise unusable pixels, or is an upper limit. The flag values are as described for the standard aperture photometry quality flag, w4flg. | ||||||||||
| 2MASS PSC Association Information | ||||||||||||||
| tmass_key | %10d | ---- | yes | 2MASS PSC association.
Unique identifier of the closest source in the
2MASS Point Source Catalog (PSC)
that falls within 3" of the position of this WISE source.
This is equivalent to the
pts_key
in the 2MASS PSC entry. This column is "null" if there is no
2MASS PSC source within 3" of the WISE source position.
The number of 2MASS PSC sources within 3" of the WISE position is
given in n_2mass
CAUTION - 2MASS source information included in the WISE source record is an association not an identification. Although the position accuracies of the two Catalogs are good, there is a non-zero probability of chance associations between physically unrelated objects, as well as missed associations between the Catalogs. You should always confirm associations by reviewing the entries from both Catalogs. |
||||||||||
| r_2mass | %7.3f | arcsec | yes | Distance separating the positions of the WISE source and associated 2MASS PSC source within 3". This column is "null" if there is no associated 2MASS PSC source. | ||||||||||
| pa_2mass | %6.1f | deg | yes | Position angle (degrees E of N) of the vector from the WISE source to the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source. | ||||||||||
| n_2mass | %3d | ---- | yes | The number of 2MASS PSC entries found within a 3" radius of the WISE source position. This column is "null" if there is no associated 2MASS PSC source. | ||||||||||
| j_m_2mass | %7.3f | mag | yes | 2MASS J-band magnitude or magnitude upper limit of the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source or if the 2MASS PSC J-band magnitude entry is "null". | ||||||||||
| j_msig_2mass | %5.3f | mag | yes | 2MASS J-band corrected photometric uncertainty of the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source or if the 2MASS PSC J-band uncertainty entry is "null". | ||||||||||
| h_m_2mass | %7.3f | mag | yes | 2MASS H-band magnitude or magnitude upper limit of the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source or if the 2MASS PSC H-band magnitude entry is "null". | ||||||||||
| h_msig_2mass | %5.3f | mag | yes | 2MASS H-band corrected photometric uncertainty of the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source or if the 2MASS PSC H-band uncertainty entry is "null". | ||||||||||
| k_m_2mass | %7.3f | mag | yes | 2MASS Ks-band magnitude of the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source or if the 2MASS PSC Ks-band magnitude entry is "null". | ||||||||||
| k_msig_2mass | %5.3f | mag | yes | 2MASS Ks-band corrected photometric uncertainty of the associated 2MASS PSC source. This column is "null" if there is no associated 2MASS PSC source or if the 2MASS PSC Ks-band uncertainty entry is "null". | ||||||||||
| Spatial Indexing Information | ||||||||||||||
| x | %19.16f | ---- | no | Unit sphere position x value | ||||||||||
| y | %19.16f | ---- | no | Unit sphere position y value | ||||||||||
| z | %19.16f | ---- | no | Unit sphere position z value | ||||||||||
| spt_ind | %9d | ---- | no | HTM spatial index key | ||||||||||
Last Update: 2011 October 5