The following table contains brief descriptions of all metadata information that is relevant to the processing of Single-exposure (level 1) images and the extraction of sources from the corresponding Single-exposure images. The table contains the unique scan ID and frame number for specific each L1 image and the reconstructed right ascension and declination of the image center. Much of the information in this table is processing-specific, and may not be of interest to general users (e.g. flags indicating whether frames have been processed or not, and the date and time for starting of the pipeline etc). The metadata table also contains some characterization and derived statistics of the Single-expsoure image frames, basic parameters used for photometry and derived statistics for extracted sources and artifacts. For example, it contains the number of sources with profile-fit photometry Signal-to-Noise (SNR) greater than 3, and the total number of real sources affected by artifacts such as latent images and electronic ghosts.
The columns in the following table are:
| Column Name | Format | Units | nulls | Description | |
|---|---|---|---|---|---|
| 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 Post-Cryo Data Release is scan 08745a. This was the first scan after the NEP crossing in the 4372nd WISE orbit. The final scan included in the Post-Cryo Release is 12514a, the first scan after the SEP crossing in the 6257th WISE orbit. |
|
| 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.
|
|
| date_proc | %20s | datetimeZ | no | The date and time of the start of WISE pipeline processing in Coordinated Universal Time (UTC). For example, scan 00945a, frameset number 179 was processed starting at 2010-04-30 03:32:27. | |
| elapsed_t | %7.2f | second | no | The elapsed processing time from the start of the WISE pipeline processing, in units of seconds. This is wall clock time. | |
| ucpu_t | %7.2f | sec | no | User CPU time for pipeline processing, in seconds. | |
| scpu_t | %7.2f | sec | no | System CPU time for pipeline processing, in seconds. | |
| status | %2d | ---- | no | This integer describes how the multi-frame pipeline terminated. A status of 0 means that the processing was successfully executed; any other status value means it failed. All status values in the metadata will be 0. | |
| ra0 | %10.6f | deg | no | Right ascension (J2000) of the raw image frame (level 0) center. | |
| dec0 | %10.2f | deg | no | Declination (J2000) of the raw image frame (level 0) center. | |
| crota0 | %17.12f | deg | no | Image twist of the raw image (level 0): the position of the image y-axis West of North at the EQUINOX; in the opposite direction of the conventional Position Angle, where position angle (P.A.) = -CROTA0. | |
| rssrate | %17.14f | arcmin/s | no | The root square sum of the three telescope axes spacecraft scan rates. | |
| moon_sep | %7.3f | deg | no | The angular distance from the frame center to the Moon. | |
| saa_sep | %7.3f | deg | no | The angular distance from the frame center to South Atlantic Anomaly (SAA) boundary. | |
| ra | %10.6f | deg | no | The right ascension (J2000) of the position-reconstructed Single-expsoure frame (level 1b) center with respect to the 2MASS PSC reference frame. | |
| dec | %10.6f | deg | no | The declination (J2000) of the position-reconstructed Single-exposure frame (level 1b) center with respect to the 2MASS PSC reference frame. | |
| crota | %17.12f | deg | no | Image twist of the position-reconstructed, Single-exposure frame (level 1b): the position of the image y-axis West of North at the EQUINOX; in the opposite direction of the conventional Position Angle, where position angle (P.A.) = -CROTA. | |
| bandbits | %2d | ---- | no | Bit-wise flag that indicates which bands have been processed, starting at band 1 = bit 0. | |
| w1bandrun | %1d | ---- | no | This flag indicates whether band 1 has been processed; 1 means yes and 0 means no. | |
| w2bandrun | %1d | ---- | no | This flag indicates whether band 2 has been processed; 1 means yes and 0 means no. | |
| date_obs | %24s | datetimeZ | no | The date and time of the mid-point of the frameset exposure, in UTC. 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. | |
| 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. | |
| wsds_vsn | %20s | ---- | no | The version number of the WISE pipeline used for this current data release. | |
| date_dbprep | %20s | datetimeZ | no | The date and time when the data was prepared by the WISE archive software DBPREP for the archive loading, in UTC. | |
| draf | %10.3f | arcsec | no | The true-angular difference in RA between the band-frame centers before and after position reconstruction, for the lowest band processed. | |
| ddecf | %10.3f | arcsec | no | The angular difference in declination between the band-frame centers before and after position reconstruction, for the lowest band processed. | |
| dpaf | %12.3f | arcsec | no | The difference in the frame position angle before and after position reconstruction, for the lowest band processed. | |
| sigraf | %11.6f | arcsec | no | The final band-frame sigma on RA for the lowest band processed. | |
| sigdcf | %11.6f | arcsec | no | The final band-frame sigma on declination for the lowest band processed. | |
| sigpaf | %9.3f | arcsec | no | The final band-frame sigma on PA for lowest band processed. | |
| qflgsf | %14s | ---- | no | The single-frame positional reconstruction quality flag. | |
| band_prex | %1d | ---- | no | The lowest band processed by the Single-frame positional reconstruction pipeline (SFPREX). This band is used for calculating draf, ddecf, dpaf, sigraf, sigdcf, and sigpaf. | |
| dra_frame | %10.3f | arcsec | no | The right ascension difference (RA) between level 0 and refined level 1 frame center. | |
| ddec_frame | %10.3f | arcsec | no | The declination difference (DEC) between level 0 and the refined level 1 frame center. | |
| dpa_frame | %11.3f | arcsec | no | The position angle difference between level 0 and the refined level 1 frame center. | |
| moon_masked | %4s | ---- | no | The flag (0/1) which indicates whether the frame is within the moon-mask area in each band. | |
| w1msknumtotbad | %7d | ---- | no | The number of pixels in the single-exposure frame that were tagged in the frame mask with a non-zero value for band 1. Not all conditions under which pixels were tagged are fatal. | |
| w2msknumtotbad | %7d | ---- | no | The number of pixels in the single-exposure frame that were tagged in the frame mask with a non-zero value for band 2. Not all conditions under which pixels were tagged are fatal. | |
| w1msknumdynabad | %7d | ---- | no | The number of dynamically masked pixels in ical processing, band 1. | |
| w1msknumdynabad | %7d | ---- | no | The number of dynamically masked pixels in ical processing, band 2. | |
| w1msknumdynabad | %7d | ---- | no | The number of dynamically masked pixels in ical processing, band 3. | |
| w1msknumdynabad | %7d | ---- | no | The number of dynamically masked pixels in ical processing, band 4. | |
| w1msknumsat | %7d | ---- | no | The number of pixels in the single-exposure frame that saturated at any sample-up-the rample read for band 1. | |
| w2msknumsat | %7d | ---- | no | The number of pixels in the single-exposure frame that saturated at any sample-up-the-ramp read for band 2. | |
| w1intnspikelo | %7d | ---- | no | The number of low valued "pixel-spike" outliers falling in the low-tail of the frame-pixel distribution for band 1. These are defined as spatial outliers, i.e., with respect to other neighboring pixels. | |
| w2intnspikelo | %7d | ---- | no | The number of low valued "pixel-spike" outliers falling in the low-tail of the frame-pixel distribution for band 1. These are defined as spatial outliers, i.e., with respect to other neighboring pixels. | |
| w1intnspikehi | %7d | ---- | no | The number of high valued "pixel-spike" outliers falling in the high-tail of the frame-pixel distribution for band 1. These are defined as spatial outliers, i.e., with respect to other neighboring pixels. | |
| w2intnspikehi | %7d | ---- | no | The number of high valued "pixel-spike" outliers falling in the high-tail of the frame-pixel distribution for band 2. These are defined as spatial outliers, i.e., with respect to other neighboring pixels. | |
| w1intmean | %15.6f | DN | no | The mean pixel value in the intensity image of the single-exposure frame for band 1. | |
| w2intmean | %15.6f | DN | no | The mean pixel value in the intensity image of the single-exposure frame for band 2. | |
| w1intmedian | %15.6f | DN | no | The median pixel value in the intensity image of the single-exposure frame for band 1. | |
| w2intmedian | %15.6f | DN | no | The median pixel value in the intensity image of the single-exposure frame for band 2. | |
| w1intstddev | %15.6f | DN | no | The standard deviation (RMS) from the mean (unbiased population estimate), band 1. | |
| w2intstddev | %15.6f | DN | no | The standard deviation (RMS) from the mean (unbiased population estimate), band 2. | |
| w1intsigltmadmed | %15.6f | DN | no | The lower-tail median absolute deviation from the median (a robust estimate of sigma) for pixels in the intensity image of the single-exposure frame for band 1. | |
| w2intsigltmadmed | %15.6f | DN | no | The lower-tail median absolute deviation from the median (a robust estimate of sigma) for pixels in the intensity image of the single-exposure frame for band 2. | |
| w1inti16_84range | %15.6f | DN | no | An estimate of sigma using the difference of the 84th - 16th percentile values for pixels in the intensity image of the single-exposure frame for band 1. It will be biased high if a high source density is present. | |
| w2inti16_84range | %15.6f | DN | no | An estimate of sigma using the difference of the 84th - 16th percentile values for pixels in the intensity image of the single-exposure frame for band 2. It will be biased high if a high source density is present. | |
| w1intmed16ptile | %15.6f | DN | no | A robust estimate of sigma using the difference of the 50th - 16th percentile values for pixels in the intensity image of the single-exposure frame for band 1. | |
| w2intmed16ptile | %15.6f | DN | no | A robust estimate of sigma using the difference of the 50th - 16th percentile values for pixels in the intensity image of the single-exposure frame for band 2. | |
| w1intratmedrange | %15.6f | ---- | no | The ratio of the (84th percentile - mode) / (mode - 16th percentile) for pixels in the intensity image of the single-exposure frame for band 1. | |
| w2intratmedrange | %15.6f | ---- | no | The ratio of the (84th percentile - mode) / (mode - 16th percentile) for pixels in the intensity image of the single-exposure frame for band 2. | |
| w1unclocscal2 | %15.6f | ---- | no | The ratio of the local RMS in intensity pixel fluctuations using the lower-tail deviation from the mode to the modal pixel uncertainty from the model, for band 1. It is analogous to the pseudo-χ2 measures defined above, but is even more robust against the presence of sources and bright, extended structure. | |
| w2unclocscal2 | %15.6f | ---- | no | The ratio of the local RMS in intensity pixel fluctuations using the lower-tail deviation from the mode to the modal pixel uncertainty from the model, for band 2. It is analogous to the pseudo-χ2 measures defined above, but is even more robust against the presence of sources and bright, extended structure. | |
| naxis | %2d | ---- | no | The number of image data axes. | |
| w1naxis1 | %4d | ---- | no | The number of image pixels in x (axis 1), band 1. | |
| w1naxis2 | %4d | ---- | no | The number of image pixels in y (axis 2), band 1. | |
| w2naxis1 | %4d | ---- | no | The number of image pixels in x (axis 1), band 2. | |
| w2naxis2 | %4d | ---- | no | The number of image pixels in y (axis 2), band 2. | |
| w1crpix1 | %6.1f | ---- | no | The image reference pixel value at the single frame image center for axis 1 (x), band 1. | |
| w1crpix2 | %6.1f | ---- | no | The image reference pixel value for axis 2 (y), band 1. | |
| w2crpix1 | %6.1f | ---- | no | The image reference pixel value for axis 1 (x), band 2. | |
| w2crpix2 | %6.1f | ---- | no | The image reference pixel value for axis 2 (y), band 2. | |
| w1crval1 | %16.12f | deg | no | The reference RA (J2000) position at the image center (crpix1, crpix2), band 1. | |
| w1crval2 | %16.12f | deg | no | The reference DEC (J2000) position at the image center (crpix1,crpix2), band 1. | |
| w1crder1 | %20.14e | deg | no | The uncertainty value in crval1 (RA), band 1. | |
| w1crder2 | %20.14e | deg | no | The uncertainty value in crval2 (DEC), band 1. | |
| w1csdradec | %21.14e | deg | no | The co-standard deviation (RMS) in crval1 and crval2 (RA and DEC), band 1. | |
| w2crval1 | %16.12f | deg | no | The reference RA (J2000) position at the image center (crpix1, crpix2), band 2. | |
| w2crval2 | %16.12f | deg | no | The reference DEC (J2000) position at the image center (crpix1,crpix2), band 2. | |
| w2crder1 | %20.14e | deg | no | The uncertainty value in crval1 (RA) for band 2. | |
| w1crder2 | %20.14e | deg | no | The uncertainty value in crval2 (DEC) for band 2. | |
| w2sdradec | %21.14e | deg | no | The co-standard deviation (RMS) in crval1 and crval2 (RA and DEC), band 2. | |
| ctype1 | %13s | -- | no | The image projection type (including distortion) for axis 1 (x, same for all bands). | |
| ctype2 | %13s | -- | no | The image projection type (including distortion) for axis 2 (y, same for all bands). | |
| equinox | %6.1f | year | no | The equinox of the World Coordinate System in the image header (same for all bands). | |
| w1elon | %16.12f | deg | no | Ecliptic longitude at the center of the image for band 1. | |
| w1elat | %16.12f | deg | no | Ecliptic latitude at the center of the image for band 1. | |
| w1glon | %16.12f | deg | no | Galactic longitude at the center of the image for band 1. | |
| w1glat | %16.12f | deg | no | Galactic latitude at the center of the image for band 1. | |
| w2elon | %16.12f | deg | no | Ecliptic longitude at the center of the image for band 2. | |
| w2elat | %16.12f | deg | no | Ecliptic latitude at the center of the image for band 2. | |
| w2glon | %16.12f | deg | no | Galactic longitude at the center of the image for band 2. | |
| w2glat | %16.12f | deg | no | Galactic latitude at the center of the image for band 2. | |
| w1ra1 | %16.12f | deg | no | The Right Ascension (RA, J2000) of the image corner No. 1 at (crpix1,crpix2=-0.5,-0.5) for band 1. | |
| w1dec1 | %16.12f | deg | no | The Declination (DEC, J2000) of the image corner No. 1 at (crpix1,crpix2=-0.5,-0.5) for band 1. | |
| w1ra2 | %16.12f | deg | no | The Right Ascension (RA, J2000) of the image corner No. 2 at (crpix1,crpix2=naxis1+0.5,-0.5) for band 1. | |
| w1dec2 | %16.12f | deg | no | The Declination (DEC, J2000) of the image corner No. 2 at (crpix1,crpix2=naxis1+0.5,-0.5) for band 1. | w1ra3 | %16.12f | deg | no | The Right Ascension (RA, J2000) of the image corner No. 3 at (crpix1,crpix2=naxis1+0.5,naxis1+0.5) for band 1. |
| w1dec3 | %16.12f | deg | no | The Declination (DEC, J2000) of the image corner No. 3 at (crpix1,crpix2=naxis1+0.5,naxis1+0.5) for band 1. | w1ra4 | %16.12f | deg | no | The Right Ascension (RA, J2000) of the image corner No. 4 at (crpix1,crpix2=-0.5,naxis1+0.5) for band 1. |
| w1dec4 | %16.12f | deg | no | The Declination (DEC, J2000) of the image corner No. 4 at (crpix1,crpix2=-0.5,naxis1+0.5) for band 1. | |
| w2ra1 | %16.12f | deg | no | The Right Ascension (RA, J2000) of the image corner No. 1 at (crpix1,crpix2=-0.5,-0.5) for band 2. | |
| w2dec1 | %16.12f | deg | no | The Declination (DEC, J2000) of the image corner No. 1 at (crpix1,crpix2=-0.5,-0.5) for band 2. | |
| w2ra2 | %16.12f | deg | no | The Right Ascension (RA, J2000) of the image corner No. 2 at (crpix1,crpix2=naxis1+0.5,-0.5) for band 2. | |
| w2dec2 | %16.12f | deg | no | The Declination (DEC, J2000) of the image corner No. 2 at (crpix1,crpix2=naxis1+0.5,-0.5) for band 2. | w2ra3 | %16.12f | deg | no | The Right Ascension (RA, J2000) of the image corner No. 3 at (crpix1,crpix2=naxis1+0.5,naxis1+0.5) for band 2. |
| w2dec3 | %16.12f | deg | no | The Declination (DEC, J2000) of the image corner No. 3 at (crpix1,crpix2=naxis1+0.5,naxis1+0.5) for band 2. | w2ra4 | %16.12f | deg | no | The Right Ascension (RA, J2000) of the image corner No. 4 at (crpix1,crpix2=-0.5,naxis1+0.5) for band 2. | w2dec4 | %16.12f | deg | no | The Declination (DEC, J2000) of the image corner No. 4 at (crpix1,crpix2=-0.5,naxis1+0.5) for band 2. |
| w1wcdelt1 | %21.18f | deg/pix | no | The image scale in deg/pixel at the reference position of (crpix1,crpixe) for axis 1 (x), band 1. | |
| w1wcdelt2 | %21.18f | deg/pix | no | The image scale in deg/pixel at the reference position of (crpix1,crpixe) for axis 2 (y), band 1. | |
| w1uncrts1 | %20.14e | deg | no | The uncertainty value in the image scale, wcdelt1, for band 1. | |
| w1uncrts2 | %20.14e | deg | no | The uncertainty value in the image scale, wcdelt2, for band 1. | |
| w1pxscal1 | %17.14f | arsec/pix | no | The image scale in Arcsecond/pixel at the reference position of the image (crpix1,crpix2) for axis 1 (x) for band 1. | |
| w1pxscal2 | %17.14f | arsec/pix | no | Arcsecond/pixel scale at the reference position of the image (crpix1,crpix2) for axis 2 (y), for band 1. | |
| w2wcdelt1 | %21.18f | deg/pix | no | The image scale in deg/pixel at the reference position of (crpix1,crpixe) for axis 1 (x), band 2. | |
| w2wcdelt2 | %21.18f | deg | no | The image scale in deg/pixel at the reference position of (crpix1,crpixe) for axis 2 (y), band 2. | |
| w2uncrts1 | %20.14e | deg/pix | no | The uncertainty value in the image scale, wcdelt1, for band 2. | |
| w2uncrts2 | %20.14e | deg | no | The uncertainty value in the image scale, wcdelt2, for band 2. | |
| w2pxscal1 | %17.14f | arsec/pix | no | The image scale in arcsecond/pixel at the reference position of the image (crpix1,crpix2) for axis 1 (x) for band 2. | |
| w2pxscal2 | %17.14f | arsec/pix | no | The image scale in arcsecond/pixel at the reference position of the image (crpix1,crpix2) for axis 2 (y) for band 2. | |
| w1pa | %18.3f | deg | no | The image position angle relative to Axis 2 (y) E of N, band 1. | |
| w1uncrtpa | %21.18f | deg | no | The uncertainty in the image position angle, band 1. | |
| w2pa | %18.3f | deg | no | The image position angle relative to Axis 2 (y) E of N, band 2. | |
| w2uncrtpa | %21.18f | deg | no | The uncertainty in the image position angle, band 2. | |
| w1skew | %5.1f | --- | no | The measure of non-orthogonality of image frame axes, band 1. | w2skew | %5.1f | --- | no | The measure of non-orthogonality of image frame axes, band 2. |
| w1cd1_1 | %21.18f | deg/pix | no | The image CD matrix element (1,1), for band 1. | |
| w1cd1_2 | %21.18f | deg/pix | no | The image CD matrix element (1,2), for band 1. | |
| w1cd2_1 | %21.18f | deg/pix | no | The image CD matrix element (2,1), for band 1. | |
| w1cd2_2 | %21.18f | deg/pix | no | The image CD matrix element (2,2), for band 1. | |
| w2cd1_1 | %21.18f | deg/pix | no | The image CD matrix element (1,1), for band 2. | |
| w2cd1_2 | %21.18f | deg/pix | no | The image CD matrix element (1,2), for band 1. | |
| w2cd2_1 | %21.18f | deg/pix | no | The image CD matrix element (2,1), for band 2. | |
| w2cd2_2 | %21.18f | deg/pix | no | The image CD matrix element (2,2), for band 2. | |
| bunit | %20s | --- | no | The image data unit. | |
| w1modeint | %10.3f | DN | no | The mode of image pixel values within the lowest sigma partition, band 1. | |
| w2modeint | %10.3f | DN | no | The mode of image pixel values within the lowest sigma partition, band 2. | |
| w1magzpunc | %9.6f | mag | no | 1-sigma uncertainty in the photometric zero-point magnitude for band 1. | |
| w2magzpunc | %9.6f | mag | no | 1-sigma uncertainty in the photometric zero-point magnitude for band 2. | |
| unixt | %16.5f | sec | no | UNIX date-time in seconds of the mid-point of the frame observation, UTC (same for all bands). | |
| ephemt | %16.6f | sec | no | Ephemeris date-time in seconds of the mid-point of the frame observation, UTC (same for all bands). | |
| w1exptime | %4.1f | sec | no | The frame exposure time, band 1. | |
| w2exptime | %4.1f | sec | no | The frame exposure time, band 2. | |
| tsamp | %4.1f | sec | no | The time interval between non-destructive reads of the samples along the ramp. | |
| w1l0file | %200s | --- | no | Corresponding level 0 image file name, band 1. | |
| w2l0file | %200s | --- | no | Corresponding level 0 image file name, band 2. | |
| icaldir | %200s | icaldir | no | The reference file directory used by the data processing module ICAL. | |
| dtanneal | %18.11f | sec | no | The time since last anneal. | |
| utanneal | %24s | datetimeZ | no | The date and time of last anneal, UTC. | |
| satapply | %4s | satapply | no | A flag with value of 0 or 1, indicating whether saturation flagging has been applied to each band. | |
| w1nsatflag | %24i | w1nsatflag | no | The number of objects in the frame being flagged as saturated, in band 1. | |
| w1nsatpix | %24i | w1nsatpix | no | The number of pixels in the frame being flagged as saturated, in band 1. | |
| w2nsatflag | %24i | w2nsatflag | no | The number of objects in the frame being flagged as saturated, in band 2. | |
| w2nsatpix | %24i | w2nsatpix | no | The number of pixels in the frame being flagged as saturated, in band 2. | |
| w1npn | %2d | ---- | no | The number of different Point-Spread-Functions used in a grid over each image frame in band 1. These PSFs take into account the differences in distortion across the frames. | |
| w2npn | %2d | ---- | no | The number of different Point-Spread-Functions used in a grid over each image frame in band 2. These PSFs take into account the differences in distortion across the frames. | nsrcall | %7d | ---- | no | The number of sources from the source detection subsystem loaded into the photometry subsystem for the frameset. |
| w1zero | %7.3f | mag | no | The photometric zero point magnitude for the Single-exposure image for band 1. | |
| w2zero | %7.3f | mag | no | The photometric zero point magnitude for the Single-exposure image for band 2. | |
| w1rap_1 | %6.3f | arcsec | yes | The radius of circular aperture 1, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w2rap_1 | %6.3f | arcsec | yes | The radius of circular aperture 1, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w1rap_2 | %6.3f | arcsec | yes | The radius of circular aperture 2, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w2rap_2 | %6.3f | arcsec | yes | The radius of circular aperture 2, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w1rap_3 | %6.3f | arcsec | yes | The radius of circular aperture 3, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w2rap_3 | %6.3f | arcsec | yes | The radius of circular aperture 3, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w1rap_4 | %6.3f | arcsec | yes | The radius of circular aperture 4, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w2rap_4 | %6.3f | arcsec | yes | The radius of circular aperture 4, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w1rap_5 | %6.3f | arcsec | yes | The radius of circular aperture 5, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w2rap_5 | %6.3f | arcsec | yes | The radius of circular aperture 5, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w1rap_6 | %6.3f | arcsec | yes | The radius of circular aperture 6, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w2rap_6 | %6.3f | arcsec | yes | The radius of circular aperture 6, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w1rap_7 | %6.3f | arcsec | yes | The radius of circular aperture 7, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w2rap_7 | %6.3f | arcsec | yes | The radius of circular aperture 7, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w1rap_8 | %6.3f | arcsec | yes | The radius of circular aperture 8, in arcseconds, used for aperture photometry in band 1. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w2rap_8 | %6.3f | arcsec | yes | The radius of circular aperture 8, in arcseconds, used for aperture photometry in band 2. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 5.5, 8.25, 11.0, 13.75, 16.5, 19.25, 22.0, and 24.75 arcseconds in bands 1, 2, and 3. | |
| w1stap | %6.3f | arcsec | no | The radius in arcseconds of the standard circular aperture used for aperture photometry in band 1, nominally 8.25 arcseconds. | |
| w2stap | %6.3f | arcsec | no | The radius in arcseconds of the standard circular aperture used for aperture photometry in band 2, nominally 8.25 arcseconds. | |
| ntable | %7d | ---- | no | The total number of sources extracted in the photometry subsystem in the Single-exposure image frameset. | |
| nwpro_adb | %7d | ---- | no | The number of sources in the frameset which were actively deblended before performing profile-fit photometry. | |
| npro_nbad | %7d | ---- | no | The number of sources in the frameset whose profile fitting photometry failed with an uncertainty value less than 0.0. | |
| w1n3sig | %7d | ---- | no | The number of sources in the frameset whose profile-fit photometry have SNR > 3 for band 1. | |
| w2n3sig | %7d | ---- | no | The number of sources in the frameset whose profile-fit photometry have SNR > 3 for band 2. | |
| w1n3sig_only | %7d | ---- | no | The number of sources in the frameset whose profile-fit photometry have SNR > 3 in band 1 only. | |
| w2n3sig_only | %7d | ---- | no | The number of sources in the frameset whose profile-fit photometry have SNR > 3 in band 2 only. | |
| n12 | %7d | ---- | no | The number of sources in the frameset whose profile-fit photometry have SNR > 3 in bands 1 and 2. | |
| nrchi_0_05 | %7d | ---- | no | The number of sources in the frameset whose profile-fit photomery have rchi2 values between 0 and 0.5. | |
| nrchi_05_2 | %7d | ---- | no | The number of sources in the frameset whose profile-fit photomery have rchi2 values between 0.5 and 2. | |
| nrchi_2_5 | %7d | ---- | no | The number of sources in the frameset whose profile-fit photomery have rchi2 values between 2 and 5. | |
| nrchi_5_15 | %7d | ---- | no | The number of sources in the frameset whose profile-fit photomery have rchi2 values between 5 and 15. | |
| nrchi_15 | %7d | ---- | no | The number of sources in the frameset whose profile-fit photomery have rchi2 values greater than 15. | |
| nblend_1 | %7d | ---- | no | The number of sources in the frameset which were not deblended before performing profile-fit photometry. | |
| nblend_2 | %7d | ---- | no | The number of sources in the frameset which were actively deblended into 2 individual sources. | |
| nblend_3 | %7d | ---- | no | The number of sources in the frameset which were actively deblended into 3 individual sources. | |
| nblend_4 | %7d | ---- | no | The number of sources in the frameset which were actively deblended into 4 individual sources. | |
| nblend_5 | %7d | ---- | no | The number of sources in the frameset which were actively deblended into 5 or more individual sources. | |
| w1n_rdiff | %6d | ---- | no | The number of real sources which are flagged as contaminated by diffraction spikes in band 1. | |
| w2n_rdiff | %6d | ---- | no | The number of real sources which are flagged as contaminated by diffraction spikes in band 2. | |
| w1n_rlshort | %6d | ---- | no | The number of real sources which are flagged as contaminated by short-term latents in band 1. | |
| w2n_rlshort | %6d | ---- | no | The number of real sources which are flagged as contaminated by short-term latents in band 2. | |
| w1n_rhalo | %6d | ---- | no | The number of real sources which are flagged as contaminated by halos in band 1. | |
| w2n_rhalo | %6d | ---- | no | The number of real sources which are flagged as contaminated by halos in band 2. | |
| w1n_roghost | %6d | ---- | no | The number of real sources which are flagged as contaminated by optical ghosts in band 1. | |
| w2n_roghost | %6d | ---- | no | The number of real sources which are flagged as contaminated by optical ghosts in band 2. | |
| w1n_rglint | %6d | ---- | no | The number of real sources which are flagged as contaminated by glints in band 1. | |
| w2n_rglint | %6d | ---- | no | The number of real sources which are flagged as contaminated by glints in band 2. | |
| w1n_sdiff | %6d | ---- | no | The number of sources which are flagged as spurious detections of diffraction spikes in band 1. | |
| w2n_sdiff | %6d | ---- | no | The number of sources which are flagged as spurious detections of diffraction spikes in band 2. | |
| w1n_slshort | %6d | ---- | no | The number of spurious sources affected by short-term latents in band 1. | |
| w2n_slshort | %6d | ---- | no | The number of spurious sources affected by short-term latents in band 2. | |
| w1n_shalo | %6d | ---- | no | The number of spurious sources caused by halos in band 1. | |
| w2n_shalo | %6d | ---- | no | The number of spurious sources caused by halos in band 2. | |
| w1n_soghost | %6d | ---- | no | The number of spurious sources which are affected by optical ghosts in band 1. | |
| w2n_soghost | %6d | ---- | no | The number of spurious sources which are affected by optical ghosts in band 2. | |
| w1n_rtot | %6d | ---- | no | The total number of real sources which are flagged as contaminated by artifacts in band 1. | |
| w2n_rtot | %6d | ---- | no | The total number of real sources which are flagged as contaminated by artifacts in band 2. | |
| n_rtot | %6d | ---- | no | The total number of real sources which are flagged as contaminated by artifacts in all four bands. | |
| w1n_stot | %6d | ---- | no | The total number of spurious sources affected by artifacts in band 1. | |
| w2n_stot | %6d | ---- | no | The total number of spurious sources affected by artifacts in band 2. | |
| n_stot | %6d | ---- | no | The total number of spurious sources affected by artifacts in all four bands. | |
| rbovera | %6.4f | ---- | no | The axial ratio of the calculated frame PSF for the lowest band available. | |
| noisepix | %9.3f | pix | no | The effective number of noise pixels in the frame PSF for the lowest band available. | |
| r_mean_20 | %6.3f | arcsec | no | The mean radial separation across the full frame for the WISE-2MASS associations with W1 SNR > 20. | |
| qual_frame | %2d | ---- | no | This integer indicates the quality score value for the Single-exposure image frameset, with values of 0 (poor quality), 5, or 10 (high quality). The value is determined by the minimum of the quality factors qc_fact, qn_fact, and qi_fact, multiplied by ten. | |
| qc_fact | %3.1f | ---- | no | This quality factor gauges the quality of completion of the Single-exposure image frameset. If the status value from the processing pipeline was equal to 0 (indicating a problem-free completion), then qc=1.0. Otherwise, qc=0.0 because the frameset failed to complete processing. All framesets in the Database have received qc values of 1.0. | |
| qi_fact | %3.1f | ---- | no | This quality factor gauges the image shape quality of the Single-exposure image frameset. It checks for potential image smearing by using the axial ratio of the PSF calculated from a subset of sources in the frameset. The value of qi is 1.0 if the axial ratio b/a > 0.60; otherwise it is 0.0. | |
| qn_fact | %3.1f | ---- | no | This quality factor indicates the background and noise characteristics quality of the Single-exposure frameset. | |
| qa_fact | %3.1f | ---- | no | This quality factor gauges the astrometric quality. If the standard deviation of WISE positions with respect to the 2MASS Point Source Catalog positions is < 0.5 arcsec on each axis (or 0.71 arcsec RSS), for sources having SNR > 20 in at least one band, then qa=1.0. Otherwise, qa=0.0. | |
| qual_scan | %2d | ---- | no | This integer indicates the quality score value for the scan containing the Single-exposure image frameset, with values of 0 (poor quality), 5, or 10 (high quality). The value is determined by the minimum of the quality factors qs1_fact, qs5_fact, and qp_fact, multiplied by ten. | |
| qs1_fact | %3.1f | ---- | no | This quality factor indicates the quality of scan synchronization as judged from the overall 1x1 PSF grid computed by the PSF Moments routine and evaluated based on the effective number of noise pixels. | |
| qs5_fact | %3.1f | ---- | no | This quality factor indicates the quality of scan synchronization as judged from the overall 5x5 PSF grid computed by the PSF Moments routine and evaluated based on the effective number of noise pixels. | |
| qp_fact | %3.1f | ---- | no | This quality factor indicates the scan photometric quality. If the scan's photometric zero-point offset computed using profile-fit photometry (pzp) falls within a certain range about 0, the value of qp_fact is 1.0; otherwise it is 0.0. | |
| cntr | %10d | ---- | no | Unique sequential identification number for the metadata table entry. |
Last Update: 2013 June 5