previous page   back to table of contents   next page

IV. AllWISE Image Atlas

IV.1. General Properties

IV.1.c. Atlas Image Metadata


IV.1.c.i. Atlas Image Metadata Table content and format description

The following table contains brief descriptions of all metadata information that is relevant to the production of the Atlas images and Source Catalog. The table contains the (RA, DEC) of the center of the Tile. 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 successfully or not, and the date and time of the start of the pipeline processing, etc.). The metadata table also contains some characterization and derived statistics of the coadd image Tile, basic photometric parameters used for photometry and derived statistics for extracted sources and artifacts. For example, it contains median pixel values of the coadded sky coverage map, 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 optical ghosts, etc.

The columns in the following table are:

Column Name Format Units nulls Description  
coadd_id %20s ---- no Atlas Tile identifier from which source was extracted. The identifier has the general form: RRRRsDDd_[trev], where
  • RRRR = Tile center RA in deci-degrees, truncated not rounded (e.g. RRRR=int[10*ra]).
  • s = Tile center Declination sign ("p"="+", "m"="-")
  • DDD = Tile center Declination in deci-degrees. For positive declinations, the tenths of a degree is truncated not rounded (e.g. DDD=int[10*dec]). For negative declinations, the tenths of a degree is always truncated leftward on the number line (e.g. DDD=ceil[10*abs(dec)].
  • [trev] = Disambiguation string.
    • t - Tile type ("a" = Atlas)
    • r - Data Release ("c" = AllWISE)
    • e - Survey Phase ("5" = AllWISE [full cryogenic + 3-Band Cryo + Post-Cryo])
    • v - Processing version.

    The disambiguation string is always ac51 for Tiles in the AllWISE Data Release products.

For example, the identifier of the AllWISE Atlas Tile with center at (α,δ = 304.13896,-13.63000) is 3041m137_ac51.

 
date_proc %20s datetimeZ no The date and time of the start of WSDC multi-frame pipeline processing in Coordinated Universal Time (UTC). For example, the atlas image 1507p696_ac51 was started at 2011-08-15 08:38:14.  
elapsed_t %10.2f 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 %9.2f sec no User CPU time for pipeline processing, in seconds.  
scpu_t %9.2f sec no System CPU time for pipeline processing, in seconds.  
ra %10.6f deg no Right ascension (J2000) of Atlas image center.  
dec %10.6f deg no Declination (J2000) of Atlas image center.  
crota %17.12f deg no Image twist: the position of the image positive y-axis West of North at the equinox in the opposite direction of the conventional Position Angle, where position angle (P.A.) = -crota.  
elon %16.12f deg no Ecliptic longitude at the center of the image.  
elat %16.12f deg no Ecliptic latitude at the center of the image.  
glon %16.12f deg no Galactic longitude at the center of the image.  
glat %16.12f deg no Galactic latitude at the center of the image.  
sizex %9.6f deg no Linear dimension of the image along axis 1 (x, same for all bands).  
sizey %9.6f deg no Linear dimension of the image along axis 2 (y, same for all bands).  
bandbits %2d ---- no Bit-wise flag that indicates which bands have been processed, starting at band 1 = bit 0. When all four bands have been processed, the value is 15.  
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.  
w3bandrun %1d ---- no This flag indicates whether band 3 has been processed; 1 means yes and 0 means no.  
w4bandrun %1d ---- no This flag indicates whether band 4 has been processed; 1 means yes and 0 means no.  
moon_lev %4s ---- no Scattered moonlight contamination flag. This is a four-character string, one character per band, in which the value is an integer indicates the fraction of single-exposure frames on which the source was measured that were possibly contaminated by scattered moonlight. The value in each band is given by [ceiling(#frmmoon/#frames*10)], with a maximum value of 9, where #frmmoon is the number of affected frames and #frames is the total number of frames on which the source was measured.  
wsds_vsn %20s ---- no The version number of the WISE multiframe 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.  
w1covmedian %12.6f ---- yes The median depth-of-coverage per pixel for the full Atlas Image footprint for band 1.  
w2covmedian %12.6f ---- yes The median depth-of-coverage per pixel for the full Atlas Image footprint for band 2.  
w3covmedian %12.6f ---- yes The median depth-of-coverage per pixel for the full Atlas Image footprint for band 3.  
w4covmedian %12.6f ---- yes The median depth-of-coverage per pixel for the full Atlas Image footprint for band 4.  
w1median %12.6f DN yes Median intensity pixel value calculated over the full coadd image for band 1.  
w2median %12.6f DN yes Median intensity pixel value calculated over the full coadd image for band 2.  
w3median %12.6f DN yes Median intensity pixel value calculated over the full coadd image for band 3.  
w4median %12.6f DN yes Median intensity pixel value calculated over the full coadd image for band 4.  
w1stddev %12.6f DN yes An unbiased estimate of the population standard-deviation (RMS deviation from the mean) over the Atlas Image intensity map for band 1.  
w2stddev %12.6f DN yes An unbiased estimate of the population standard-deviation (RMS deviation from the mean) over the Atlas Image intensity map for band 2.  
w3stddev %12.6f DN yes An unbiased estimate of the population standard-deviation (RMS deviation from the mean) over the Atlas Image intensity map for band 3.  
w4stddev %12.6f DN yes An unbiased estimate of the population standard-deviation (RMS deviation from the mean) over the Atlas Image intensity map for band 4.  
w1mode_22 %12.6f DN yes The approximate modal pixel value for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 1.  
w2mode_22 %12.6f DN yes The approximate modal pixel value for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 2.  
w3mode_22 %12.6f DN yes The approximate modal pixel value for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 3.  
w4mode_22 %12.6f DN yes The approximate modal pixel value for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 4.  
w1numatmedcov_22 %8d ---- yes The number of pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. (e.g. If the median depth-of-coverage is 8.0, it's the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w2numatmedcov_22 %8d ---- yes The number of pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 2. (e.g. If the median depth-of-coverage is 8.0, it's the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w3numatmedcov_22 %8d ---- yes The number of pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 3. (e.g. If the median depth-of-coverage is 8.0, it's the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w4numatmedcov_22 %8d ---- yes The number of pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 4. (e.g. If the median depth-of-coverage is 8.0, it's the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w1sigltmadmed_22 %12.6f DN yes The lower-tail median absolute deviation from the median (a robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w2sigltmadmed_22 %12.6f DN yes The lower-tail median absolute deviation from the median (a robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 2. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w3sigltmadmed_22 %12.6f DN yes The lower-tail median absolute deviation from the median (a robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 3. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w4sigltmadmed_22 %12.6f DN yes The lower-tail median absolute deviation from the median (a robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 4. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w1sigltstdmod_22 %12.6f DN yes The lower-tail trimmed standard-deviation from the mode (another robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w2sigltstdmod_22 %12.6f DN yes The lower-tail trimmed standard-deviation from the mode (another robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 2. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w3sigltstdmod_22 %12.6f DN yes The lower-tail trimmed standard-deviation from the mode (another robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 3. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w4sigltstdmod_22 %12.6f DN yes The lower-tail trimmed standard-deviation from the mode (another robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 4. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w1med16ptile_22 %12.6f DN yes A robust estimate of sigma using the difference of 50th - 16th percentile values for intensity pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w2med16ptile_22 %12.6f DN yes A robust estimate of sigma using the difference of 50th - 16th percentile values for intensity pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 2. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w3med16ptile_22 %12.6f DN yes A robust estimate of sigma using the difference of 50th - 16th percentile values for intensity pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 3. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w4med16ptile_22 %12.6f DN yes A robust estimate of sigma using the difference of 50th - 16th percentile values for intensity pixels with depth-of-coverage within the interval: median 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 4. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w1mdatmedcov_22 %12.6f DN yes The median uncertainty pixel value at the median coverage in the central region of the full Tile for band 1.  
w2mdatmedcov_22 %12.6f DN yes The median uncertainty pixel value at the median coverage in the central region of the full Tile for band 2.  
w3mdatmedcov_22 %12.6f DN yes The median uncertainty pixel value at the median coverage in the central region of the full Tile for band 3.  
w4mdatmedcov_22 %12.6f DN yes The median uncertainty pixel value at the median coverage in the central region of the full Tile for band 4.  
w1medflag %10.1f ---- yes The median number of pixels flagged per frame, calculated over all "good" frames that contributed to the Atlas Image for band 1.  
w2medflag %10.1f ---- yes The median number of pixels flagged per frame, calculated over all "good" frames that contributed to the Atlas Image for band 2.  
w3medflag %10.1f ---- yes The median number of pixels flagged per frame, calculated over all "good" frames that contributed to the Atlas Image for band 3.  
w4medflag %10.1f ---- yes The median number of pixels flagged per frame, calculated over all "good" frames that contributed to the Atlas Image for band 4.  
w1medoutlier %10.1f ---- yes The median number of temporal outlier pixels per frame, calculated over all "good" frames that contributed to the Atlas Image for band 1.  
w2medoutlier %10.1f ---- yes The median number of temporal outlier pixels per frame, calculated over all "good" frames that contributed to the Atlas Image for band 2.  
w3medoutlier %10.1f ---- yes The median number of temporal outlier pixels per frame, calculated over all "good" frames that contributed to the Atlas Image for band 3.  
w4medoutlier %10.1f ---- yes The median number of temporal outlier pixels per frame, calculated over all "good" frames that contributed to the Atlas Image for band 4.  
w1date_obs1 %24s datetimeZ yes The date and time (UTC) of the observation for the earliest frame in the Atlas Image stack for band 1.  
w2date_obs1 %24s datetimeZ yes The date and time (UTC) of the observation for the earliest frame in the Atlas Image stack for band 2.  
w3date_obs1 %24s datetimeZ yes The date and time (UTC) of the observation for the earliest frame in the Atlas Image stack for band 3.  
w4date_obs1 %24s datetimeZ yes The date and time (UTC) of the observation for the earliest frame in the Atlas Image stack for band 4.  
w1mid_obs %24s datetimeZ yes The date and time (UTC) of the observation for the middle frame in the coadd stack for band 1.  
w2mid_obs %24s datetimeZ yes The date and time (UTC) of the observation for the middle frame in the coadd stack for band 2.  
w3mid_obs %24s datetimeZ yes The date and time (UTC) of the observation for the middle frame in the coadd stack for band 3.  
w4mid_obs %24s datetimeZ yes The date and time (UTC) of the observation for the middle frame in the coadd stack for band 4.  
w1date_obs2 %24s datetimeZ yes The date and time (UTC) of the observation for the latest frame in the coadd stack for band 1.  
w2date_obs2 %24s datetimeZ yes The date and time (UTC) of the observation for the latest frame in the coadd stack for band 2.  
w3date_obs2 %24s datetimeZ yes The date and time (UTC) of the observation for the latest frame in the coadd stack for band 3.  
w4date_obs2 %24s datetimeZ yes The date and time (UTC) of the observation for the latest frame in the coadd stack for band 4.  
w1moonrej %6d ---- yes The number of single-exposure frames rejected due to moon glow when constructing the Atlas Image for band 1. See section IV.4.f.iv on moon-affected frames.  
w2moonrej %6d ---- yes The number of single-exposure frames rejected due to moon glow when constructing the Atlas Image for band 2. See section IV.4.f.iv on moon-affected frames.  
w3moonrej %6d ---- yes The number of single-exposure frames rejected due to moon glow when constructing the Atlas Image for band 3. See section IV.4.f.iv on moon-affected frames.  
w4moonrej %6d ---- yes The number of single-exposure frames rejected due to moon glow when constructing the Atlas Image for band 4. See section IV.4.f.iv on moon-affected frames.  
w1mooninp %6d ---- yes The number of single-exposure frames for band 1 with suspected moon-glow as determined by the moon-mask prior to any filtering by the moon-rejection algorithm. See section IV.4.f.iv on moon-affected frames.  
w2mooninp %6d ---- yes The number of single-exposure frames for band 2 with suspected moon-glow as determined by the moon-mask prior to any filtering by the moon-rejection algorithm. See section IV.4.f.iv on moon-affected frames.  
w3mooninp %6d ---- yes The number of single-exposure frames for band 3 with suspected moon-glow as determined by the moon-mask prior to any filtering by the moon-rejection algorithm. See section IV.4.f.iv on moon-affected frames.  
w4mooninp %6d ---- yes The number of single-exposure frames for band 4 with suspected moon-glow as determined by the moon-mask prior to any filtering by the moon-rejection algorithm. See section IV.4.f.iv on moon-affected frames.  
w1numfrms %5d ---- yes The final number of single-exposure frames touching the Atlas Image footprint after all filtering is performed for band 1.  
w2numfrms %5d ---- yes The final number of single-exposure frames touching the Atlas Image footprint after all filtering is performed for band 2.  
w3numfrms %5d ---- yes The final number of single-exposure frames touching the Atlas Image footprint after all filtering is performed for band 3.  
w4numfrms %5d ---- yes The final number of single-exposure frames touching the Atlas Image footprint after all filtering is performed for band 4.  
w1lowcovpc1 %10.6f ---- yes The percentage of the area within the Atlas Image footprint which has the depth of coverage ≤ 4 pixels for band 1. See also the cautionary note in section I.4.c.ii.  
w2lowcovpc1 %10.6f ---- yes The percentage of the area within the Atlas Image footprint which has the depth of coverage ≤ 4 pixels for band 2. See also the cautionary note in section I.4.c.ii.  
w3lowcovpc1 %10.6f ---- yes The percentage of the area within the Atlas Image footprint which has the depth of coverage ≤ 4 pixels for band 3. See also the cautionary note in section I.4.c.ii.  
w4lowcovpc1 %10.6f ---- yes The percentage of the area within the Atlas Image footprint which has the depth of coverage ≤ 4 pixels for band 4. See also the cautionary note in section I.4.c.ii.  
w1lowcovpc2 %10.6f ---- yes The percentage of the area within the Atlas Image footprint which has the depth of coverage ≤ 6 pixels for band 1.  
w2lowcovpc2 %10.6f ---- yes The percentage of the area within the Atlas Image footprint which has the depth of coverage ≤ 6 pixels for band 2.  
w3lowcovpc2 %10.6f ---- yes The percentage of the area within the Atlas Image footprint which has the depth of coverage ≤ 6 pixels for band 3.  
w4lowcovpc2 %10.6f ---- yes The percentage of the area within the Atlas Image footprint which has the depth of coverage ≤ 6 pixels for band 4.  
w1nomcovpc %10.6f ---- yes The percentage of the area within the Atlas Image footprint which has the depth of coverage ≤ 8 pixels for band 1.  
w2nomcovpc %10.6f ---- yes The percentage of the area within the Atlas Image footprint which has the depth of coverage ≤ 8 pixels for band 2.  
w3nomcovpc %10.6f ---- yes The percentage of the area within the Atlas Image footprint which has the depth of coverage ≤ 8 pixels for band 3.  
w4nomcovpc %10.6f ---- yes The percentage of the area within the Atlas Image footprint which has the depth of coverage ≤ 8 pixels for band 4.  
w1mincovpc %10.6f ---- yes The percentage of the area of the internal working image tile used for outlier-detection which has the depth of coverage ≤ 4 pixels for band 1.  
w2mincovpc %10.6f ---- yes The percentage of the area of the internal working image tile used for outlier-detection which has the depth of coverage ≤ 4 pixels for band 2.  
w3mincovpc %10.6f ---- yes The percentage of the area of the internal working image tile used for outlier-detection which has the depth of coverage ≤ 4 pixels for band 3.  
w4mincovpc %10.6f ---- yes The percentage of the area of the internal working image tile used for outlier-detection which has the depth of coverage ≤ 4 pixels for band 4.  
w1medrobsig %14.6f ---- yes The robust estimate of the spatial sigma for pixels with depth-of-coverage values within the interval: median 0.25, for band 1. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25.)  
w2medrobsig %14.6f ---- yes The robust estimate of the spatial sigma for pixels with depth-of-coverage values within the interval: median 0.25, for band 2. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25.)  
w3medrobsig %14.6f ---- yes The robust estimate of the spatial sigma for pixels with depth-of-coverage values within the interval: median 0.25, for band 3. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25.)  
w3medrobsig %14.6f ---- yes The robust estimate of the spatial sigma for pixels with depth-of-coverage values within the interval: median 0.25, for band 4. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25.)  
w1medrobchi1 %11.6f ---- yes The ratio between the robust spatial sigma and the median uncertainty for pixels with depth-of-coverage values within the interval: median 0.25, for band 1. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25.)  
w2medrobchi1 %11.6f ---- yes The ratio between the robust spatial sigma and the median uncertainty for pixels with depth-of-coverage values within the interval: median 0.25, for band 2. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25.)  
w3medrobchi1 %11.6f ---- yes The ratio between the robust spatial sigma and the median uncertainty for pixels with depth-of-coverage values within the interval: median 0.25, for band 3. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25.)  
w4medrobchi1 %11.6f ---- yes The ratio between the robust spatial sigma and the median uncertainty for pixels with depth-of-coverage values within the interval: median 0.25, for band 4. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25.)  
w1medrobchi2 %11.6f ---- yes The ratio between the robust spatial sigma and the modal uncertainty for pixels with depth-of-coverage values within the interval: median 0.25, for band 1. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25.)  
w2medrobchi2 %11.6f ---- yes The ratio between the robust spatial sigma and the modal uncertainty for pixels with depth-of-coverage values within the interval: median 0.25, for band 2. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25.)  
w3medrobchi2 %11.6f ---- yes The ratio between the robust spatial sigma and the modal uncertainty for pixels with depth-of-coverage values within the interval: median 0.25, for band 3. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25.)  
w4medrobchi2 %11.6f ---- yes The ratio between the robust spatial sigma and the modal uncertainty for pixels with depth-of-coverage values within the interval: median 0.25, for band 4. (e.g. If the median depth-of-coverage is 8.0, it uses pixels with depth-of-coverages from 7.75 to 8.25.)  
w1randseed %10d ---- yes The random seed used to randomize the input single-exposure frame sequence to assist with temporal outlier-detection for band 1.  
w2randseed %10d ---- yes The random seed used to randomize the input single-exposure frame sequence to assist with temporal outlier-detection for band 2.  
w3randseed %10d ---- yes The random seed used to randomize the input single-exposure frame sequence to assist with temporal outlier-detection for band 3.  
w4randseed %10d ---- yes The random seed used to randomize the input single-exposure frame sequence to assist with temporal outlier-detection for band 4.  
naxis %1d ---- no Number of data axes; it is always '2' for two-dimensional images.  
naxis1 %4d ---- no Length of data axis 1 or number of columns in the image.  
naxis2 %4d ---- no Length of data axis 2 or number of rows in the image.  
crpix1 %9.1f pix no Axis 1 reference pixel at position crval1,crval2: 0.5*(naxis1+1)  
crpix2 %9.1f pix no Axis 2 reference pixel at position crval1,crval2: 0.5*(naxis2+1)  
ctype1 %13s -- no Projection type for axis 1. It is always set to use the SIN (orthographic) projection; for the definition, see Calabretta & Greisen, 2002.  
ctype2 %13s -- no Projection type for axis 2. It is always set to use the SIN (orthographic) projection; for the definition, see Calabretta & Greisen, 2002.  
equinox %6.1f year no The equinox of the World Coordinate System (WCS).  
bunit %6s ---- no Image pixel units: Data Number (DN) for intensity and uncertainty filetypes; "effective pixels" for the coverage filetype. Image filetypes are described in section II.3.  
ra1 %16.12f deg no Right Ascension (RA, J2000) at the image corner #1 (crpix1,crpix2 = -0.5,-0.5)  
dec1 %16.12f deg no Declination (DEC, J2000) at the image corner #1 (crpix1,crpix2 = -0.5,-0.5)  
ra2 %16.12f deg no Right Ascension (RA, J2000) at the image corner #2 (crpix1,crpix2 = naxis1+0.5,-0.5)  
dec2 %16.12f deg no Declination (DEC, J2000) at the image corner #2 (crpix1,crpix2 = naxis1+0.5,-0.5)  
ra3 %16.12f deg no Right Ascension (RA, J2000) at the image corner #3 (crpix1,crpix2 = naxis1+0.5,naxis2+0.5)  
dec3 %16.12f deg no Declination (DEC, J2000) at the image corner #3 (crpix1,crpix2 = naxis1+0.5,naxis2+0.5)  
ra4 %16.12f deg no Right Ascension (RA, J2000) at the image corner #4 (crpix1,crpix2 = -0.5,naxis2+0.5)  
dec4 %16.12f deg no Declination (DEC, J2000) at the image corner #4 (crpix1,crpix2 = -0.5,naxis2+0.5)  
w1fcdate %20s datetimeZ yes Date and time of the intensity image file creation in Coordinated Universal Time (UTC), band 1.  
w2fcdate %20s datetimeZ yes Date and time of the intensity image file creation in Coordinated Universal Time (UTC), band 2.  
w3fcdate %20s datetimeZ yes Date and time of the intensity image file creation in Coordinated Universal Time (UTC), band 3.  
w4fcdate %20s datetimeZ yes Date and time of the intensity image file creation in Coordinated Universal Time (UTC), band 4.  
pxscal1 %9.6f arcsec/pix no Arcsecond per pixel scale at the reference position of the image (crpix1,crpix2) for axis 1 (x).  
pxscal2 %9.6f arcsec/pix no Arcsecond per pixel scale at the reference position of the image (crpix1,crpix2) for axis 2 (y).  
cdelt1 %21.18f deg/pix no Degree per pixel scale at the reference position of the image (crpix1,crpix2) for axis 1 (x). See pxscal1 for the arcsec equivalent.  
cdelt2 %21.18f deg/pix no Degree per pixel scale at the reference position of the image (crpix1,crpix2) for axis 2 (y). See pxscal2 for the arcsec equivalent.  
w1mincov %10.3f ---- yes The minimum depth of coverage of the Atlas Image for band 1.  
w2mincov %10.3f ---- yes The minimum depth of coverage of the Atlas Image for band 2.  
w3mincov %10.3f ---- yes The minimum depth of coverage of the Atlas Image for band 3.  
w4mincov %10.3f ---- yes The minimum depth of coverage of the Atlas Image for band 4.  
w1maxcov %10.3f ---- yes The maximum depth of coverage of the Atlas Image for band 1.  
w2maxcov %10.3f ---- yes The maximum depth of coverage of the Atlas Image for band 2.  
w3maxcov %10.3f ---- yes The maximum depth of coverage of the Atlas Image for band 3.  
w4maxcov %10.3f ---- yes The maximum depth of coverage of the Atlas Image for band 4.  
w1mednmsk %10.1f ---- yes The median number of masked pixels per frame in the frames used in the Atlas Image for band 1.  
w2mednmsk %10.1f ---- yes The median number of masked pixels per frame in the frames used in the Atlas Image for band 2.  
w3mednmsk %10.1f ---- yes The median number of masked pixels per frame in the frames used in the Atlas Image for band 3.  
w4mednmsk %10.1f ---- yes The median number of masked pixels per frame in the frames used in the Atlas Image for band 4.  
w1bitmask %9d ---- yes Fatal bitstring mask template used to signal rejected input frame pixels for band 1. The bits are defined here.  
w2bitmask %9d ---- yes Fatal bitstring mask template used to signal rejected input frame pixels for band 2. The bits are defined here.  
w3bitmask %9d ---- yes Fatal bitstring mask template used to signal rejected input frame pixels for band 3. The bits are defined here.  
w4bitmask %9d ---- yes Fatal bitstring mask template used to signal rejected input frame pixels for band 4. The bits are defined here.  
w1npn %2d ---- yes 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 ---- yes 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.  
w3npn %2d ---- yes The number of different Point-Spread-Functions used in a grid over each image frame in band 3. These PSFs take into account the differences in distortion across the frames.  
w4npn %2d ---- yes The number of different Point-Spread-Functions used in a grid over each image frame in band 4. These PSFs take into account the differences in distortion across the frames.  
mergetype %2d ---- no This integer indicates the weighting function used in calculating the mean flux statistics for the WPRO internal repeatability fields. 1 indicates the inverse variance method was used, and 0 indicates uniform weighting.  
nsrcall %7d ---- no The number of sources from the source detection subsystem loaded into the photometry subsystem for the Tile.  
w1magzp %8.4f mag yes The photometric zero point magnitude for the coadded Atlas image for band 1. This value is found in the band 1 Atlas image header with the keyword MAGZP.  
w2magzp %8.4f mag yes The photometric zero point magnitude for the coadded Atlas image for band 2. This value is found in the band 2 Atlas image header with the keyword MAGZP.  
w3magzp %8.4f mag yes The photometric zero point magnitude for the coadded Atlas image for band 3. This value is found in the band 3 Atlas image header with the keyword MAGZP.  
w4magzp %8.4f mag yes The photometric zero point magnitude for the coadded Atlas image for band 4. This value is found in the band 4 Atlas image header with the keyword MAGZP.  
w1magzpunc %8.6f mag yes 1-sigma uncertainty in the photometric zero-point magnitude for band 1.  
w2magzpunc %8.6f mag yes 1-sigma uncertainty in the photometric zero-point magnitude for band 2.  
w3magzpunc %8.6f mag yes 1-sigma uncertainty in the photometric zero-point magnitude for band 3.  
w4magzpunc %8.6f mag yes 1-sigma uncertainty in the photometric zero-point magnitude for band 4.  
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.  
w3rap_1 %6.3f arcsec yes The radius of circular aperture 1, in arcseconds, used for aperture photometry in band 3. 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.  
w4rap_1 %7.3f arcsec yes The radius of circular aperture 1, in arcseconds, used for aperture photometry in band 4. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 11.0, 16.5, 22.0, 27.5, 33.0, 38.5, 44.0 and 49.5 arcseconds in band 4.  
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.  
w3rap_2 %6.3f arcsec yes The radius of circular aperture 2, in arcseconds, used for aperture photometry in band 3. 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.  
w4rap_2 %7.3f arcsec yes The radius of circular aperture 2, in arcseconds, used for aperture photometry in band 4. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 11.0, 16.5, 22.0, 27.5, 33.0, 38.5, 44.0 and 49.5 arcseconds in band 4.  
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.  
w3rap_3 %6.3f arcsec yes The radius of circular aperture 3, in arcseconds, used for aperture photometry in band 3. 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.  
w4rap_3 %7.3f arcsec yes The radius of circular aperture 3, in arcseconds, used for aperture photometry in band 4. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 11.0, 16.5, 22.0, 27.5, 33.0, 38.5, 44.0 and 49.5 arcseconds in band 4.  
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.  
w3rap_4 %6.3f arcsec yes The radius of circular aperture 4, in arcseconds, used for aperture photometry in band 3. 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.  
w4rap_4 %7.3f arcsec yes The radius of circular aperture 4, in arcseconds, used for aperture photometry in band 4. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 11.0, 16.5, 22.0, 27.5, 33.0, 38.5, 44.0 and 49.5 arcseconds in band 4.  
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.  
w3rap_5 %6.3f arcsec yes The radius of circular aperture 5, in arcseconds, used for aperture photometry in band 3. 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.  
w4rap_5 %7.3f arcsec yes The radius of circular aperture 5, in arcseconds, used for aperture photometry in band 4. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 11.0, 16.5, 22.0, 27.5, 33.0, 38.5, 44.0 and 49.5 arcseconds in band 4.  
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.  
w3rap_6 %6.3f arcsec yes The radius of circular aperture 6, in arcseconds, used for aperture photometry in band 3. 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.  
w4rap_6 %7.3f arcsec yes The radius of circular aperture 6, in arcseconds, used for aperture photometry in band 4. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 11.0, 16.5, 22.0, 27.5, 33.0, 38.5, 44.0 and 49.5 arcseconds in band 4.  
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.  
w3rap_7 %6.3f arcsec yes The radius of circular aperture 7, in arcseconds, used for aperture photometry in band 3. 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.  
w4rap_7 %7.3f arcsec yes The radius of circular aperture 7, in arcseconds, used for aperture photometry in band 4. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 11.0, 16.5, 22.0, 27.5, 33.0, 38.5, 44.0 and 49.5 arcseconds in band 4.  
w1rap_8 %7.3f 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 %7.3f 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.  
w3rap_8 %7.3f arcsec yes The radius of circular aperture 8, in arcseconds, used for aperture photometry in band 3. 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.  
w4rap_8 %7.3f arcsec yes The radius of circular aperture 8, in arcseconds, used for aperture photometry in band 4. The WISE aperture photometry was performed with a set of 8 fixed circular apertures, with radii of 11.0, 16.5, 22.0, 27.5, 33.0, 38.5, 44.0 and 49.5 arcseconds in band 4.  
w1stap %6.3f arcsec yes The radius in arcseconds of the standard circular aperture used for aperture photometry in band 1, nominally 8.25 arcseconds.  
w2stap %6.3f arcsec yes The radius in arcseconds of the standard circular aperture used for aperture photometry in band 2, nominally 8.25 arcseconds.  
w3stap %6.3f arcsec yes The radius in arcseconds of the standard circular aperture used for aperture photometry in band 3, nominally 8.25 arcseconds.  
w4stap %6.3f arcsec yes The radius in arcseconds of the standard circular aperture used for aperture photometry in band 4, nominally 16.5 arcseconds.  
ntable %7d ---- no The total number of sources extracted in the photometry subsystem in the Tile.  
nwpro_adb %7d ---- no The number of sources in the Tile that were actively deblended before performing profile-fit photometry.  
npro_nbad %7d ---- no The number of sources in the Tile whose profile fit photometry failed with an uncertainty value less than 0.0.  
w1n3sig %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 for band 1.  
w2n3sig %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 for band 2.  
w3n3sig %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 for band 3.  
w4n3sig %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 for band 4.  
w1n3sig_only %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in band 1 only.  
w2n3sig_only %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in band 2 only.  
w3n3sig_only %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in band 3 only.  
w4n3sig_only %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in band 4 only.  
n12 %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 1 and 2.  
n13 %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 1 and 3.  
n14 %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 1 and 4.  
n23 %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 2 and 3.  
n24 %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 2 and 4.  
n34 %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 3 and 4.  
n123 %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 1, 2 and 3.  
n124 %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 1, 2 and 4.  
n234 %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 2, 3 and 4.  
n1234 %7d ---- yes The number of sources in the Tile whose profile-fit photometry have SNR > 3 in all bands.  
nrchi_0_05 %7d ---- no The number of sources in the Tile whose profile-fit photomery have rchi2 values between 0 and 0.5.  
nrchi_05_2 %7d ---- no The number of sources in the Tile whose profile-fit photomery have rchi2 values between 0.5 and 2.  
nrchi_2_5 %7d ---- no The number of sources in the Tile whose profile-fit photomery have rchi2 values between 2 and 5.  
nrchi_5_15 %7d ---- no The number of sources in the Tile whose profile-fit photomery have rchi2 values between 5 and 15.  
nrchi_15 %7d ---- no The number of sources in the Tile whose profile-fit photomery have rchi2 values greater than 15.  
nblend_1 %7d ---- no The number of sources in the Tile which were not deblended before performing profile-fit photometry.  
nblend_2 %7d ---- no The number of sources in the Tile which were deblended into 2 individual sources.  
nblend_3 %7d ---- no The number of sources in the Tile which were deblended into 3 individual sources.  
nblend_4 %7d ---- no The number of sources in the Tile which were deblended into 4 individual sources.  
nblend_5 %7d ---- no The number of sources in the Tile which were deblended into 5 or more individual sources.  
ngal %7d ---- no The number of sources in the Tile that were found to be in close proximity (≤ 2 arcsec) to 2MASS Extended Source Catalog sources.  
w1n_rdiff %6d ---- yes The number of real sources which are flagged as contaminated by diffraction spikes in band 1.  
w2n_rdiff %6d ---- yes The number of real sources which are flagged as contaminated by diffraction spikes in band 2.  
w3n_rdiff %6d ---- yes The number of real sources which are flagged as contaminated by diffraction spikes in band 3.  
w4n_rdiff %6d ---- yes The number of real sources which are flagged as contaminated by diffraction spikes in band 4.  
w1n_rlshort %6d ---- yes The number of real sources which are flagged as contaminated by short-term latents in band 1.  
w2n_rlshort %6d ---- yes The number of real sources which are flagged as contaminated by short-term latents in band 2.  
w3n_rlshort %6d ---- yes The number of real sources which are flagged as contaminated by short-term latents in band 3.  
w4n_rlshort %6d ---- yes The number of real sources which are flagged as contaminated by short-term latents in band 4.  
w3n_rlldsresist %6d ---- yes The number of real sources affected by long-term latents which cannot be corrected by DYNASKY in band 3.  
w4n_rlldsresist %6d ---- yes The number of real sources affected by long-term latents which cannot be corrected by DYNASK in band 4.  
w3n_rllong %6d ---- yes The number of real sources affected by long-term latents, band 3.  
w4n_rllong %6d ---- yes The number of real sources affected by long-term latents, band 4.  
w1n_rhalo %6d ---- yes The number of real sources which are flagged as contaminated by halos in band 1.  
w2n_rhalo %6d ---- yes The number of real sources which are flagged as contaminated by halos in band 2.  
w3n_rhalo %6d ---- yes The number of real sources which are flagged as contaminated by halos in band 3.  
w4n_rhalo %6d ---- yes The number of real sources which are flagged as contaminated by halos in band 4.  
w1n_roghost %6d ---- yes The number of real sources which are flagged as contaminated by optical ghosts in band 1.  
w2n_roghost %6d ---- yes The number of real sources which are flagged as contaminated by optical ghosts in band 2.  
w3n_roghost %6d ---- yes The number of real sources which are flagged as contaminated by optical ghosts in band 3.  
w4n_roghost %6d ---- yes The number of real sources which are flagged as contaminated by optical ghosts in band 4.  
w1n_sdiff %6d ---- yes The number of sources which are flagged as spurious detections of diffraction spikes in band 1. None of these sources will be found in the Source Catalog.  
w2n_sdiff %6d ---- yes The number of sources which are flagged as spurious detections of diffraction spikes in band 2. None of these sources will be found in the Source Catalog.  
w3n_sdiff %6d ---- yes The number of sources which are flagged as spurious detections of diffraction spikes in band 3. None of these sources will be found in the Source Catalog.  
w4n_sdiff %6d ---- yes The number of sources which are flagged as spurious detections of diffraction spikes in band 4. None of these sources will be found in the Source Catalog.  
w1n_slshort %6d ---- yes The number of sources which are flagged as spurious detections due to short-term latents in band 1. None of these sources will be found in the Source Catalog.  
w2n_slshort %6d ---- yes The number of sources which are flagged as spurious detections due to short-term latents in band 2. None of these sources will be found in the Source Catalog.  
w3n_slshort %6d ---- yes The number of sources which are flagged as spurious detections due to short-term latents in band 3. None of these sources will be found in the Source Catalog.  
w4n_slshort %6d ---- yes The number of sources which are flagged as spurious detections due to short-term latents in band 4. None of these sources will be found in the Source Catalog.  
w3n_slldsresist %6d ---- yes The number of sources flagged as spurious detections due to long-term latents which cannot be corrected by DYNASKY in band 3. None of these sources will be found in the Source Catalog.  
w4n_slldsresist %6d ---- yes The number of sources flagged as spurious detections due to long-term latents which cannot be corrected by DYNASKY in band 4. None of these sources will be found in the Source Catalog.  
w1n_shalo %6d ---- yes The number of sources which are flagged as spurious detections of halos in band 1. None of these sources will be found in the Source Catalog.  
w2n_shalo %6d ---- yes The number of sources which are flagged as spurious detections of halos in band 2. None of these sources will be found in the Source Catalog.  
w3n_shalo %6d ---- yes The number of sources which are flagged as spurious detections of halos in band 3. None of these sources will be found in the Source Catalog.  
w4n_shalo %6d ---- yes The number of sources which are flagged as spurious detections of halos in band 4. None of these sources will be found in the Source Catalog.  
w1n_soghost %6d ---- yes The number of sources which are flagged as spurious detections of optical ghosts in band 1. None of these sources will be found in the Source Catalog.  
w2n_soghost %6d ---- yes The number of sources which are flagged as spurious detections of optical ghosts in band 2. None of these sources will be found in the Source Catalog.  
w3n_soghost %6d ---- yes The number of sources which are flagged as spurious detections of optical ghosts in band 3. None of these sources will be found in the Source Catalog.  
w4n_soghost %6d ---- yes The number of sources which are flagged as spurious detections of optical ghosts in band 4. None of these sources will be found in the Source Catalog.  
w1n_rtot %6d ---- yes The total number of real sources which are flagged as contaminated by artifacts in band 1.  
w2n_rtot %6d ---- yes The total number of real sources which are flagged as contaminated by artifacts in band 2.  
w3n_rtot %6d ---- yes The total number of real sources which are flagged as contaminated by artifacts in band 3.  
w4n_rtot %6d ---- yes The total number of real sources which are flagged as contaminated by artifacts in band 4.  
n_rtot %6d ---- yes The total number of real sources which are flagged as contaminated by artifacts in any band.  
w1n_stot %6d ---- yes The total number of spurious sources which are flagged as spurious detections of artifacts in band 1. None of these sources will be found in the Source Catalog.  
w2n_stot %6d ---- yes The total number of spurious sources which are flagged as spurious detections of artifacts in band 2. None of these sources will be found in the Source Catalog.  
w3n_stot %6d ---- yes The total number of spurious sources which are flagged as spurious detections of artifacts in band 3. None of these sources will be found in the Source Catalog.  
w4n_stot %6d ---- yes The total number of spurious sources which are flagged as spurious detections of artifacts in band 4. None of these sources will be found in the Source Catalog.  
n_stot %6d ---- yes The total number of spurious sources which are flagged as spurious detections of artifacts in any band. None of these sources will be found in the Source Catalog.  
rbovera %6.4f ---- no The axial ratio of the calculated PSF using the Atlas Image, for the lowest band available.  
noisepix %9.3f pix no The effective number of noise pixels in the calculated PSF using the Atlas Image, for the lowest band available.  
rdist_mean %6.3f arcsec yes The mean radial separation of all the WISE-2MASS source associations having WISE w1snr ≥ 20.  
rdist_med %6.3f arcsec yes The median radial separation of all the WISE-2MASS source associations having WISE w1snr ≥ 20.  
rdist_stddev %6.3f arcsec yes The standard deviation in radial separations of all the WISE-2MASS source associations having WISE w1snr ≥ 20.  
x_off_3 %11.6f arcsec yes The x offset derived from the 3-parameter plate solution using WISE-2MASS source associations where both sources have SNR ≥ 20.  
y_off_3 %11.6f arcsec yes The y offset derived from the 3-parameter plate solution using WISE-2MASS source associations where both sources have SNR ≥ 20.  
rot_3 %13.8f deg yes The image rotation derived from the 3-parameter plate solution using WISE-2MASS source associations where both sources have SNR ≥ 20.  
max_off_3 %11.6f arcsec yes The maximum offset derived from the 3-parameter plate solution using WISE-2MASS source associations where both sources have SNR ≥ 20.  
dra_popsd %11.6f arcsec yes The population standard deviation of the RA offsets for WISE-2MASS source associations where both sources have SNR ≥ 20.  
ddec_popsd %11.6f arcsec yes The population standard deviation of the Declination offsets for WISE-2MASS source associations where both sources have SNR ≥ 20.  
xoffpr %10.6f arcsec yes The x offset of the Tile's multiframe fit to 2MASS position reference stars.  
yoffpr %10.6f arcsec yes The y offset of the Tile's multiframe fit to 2MASS position reference stars.  
rotpr %11.6f deg yes The rotation angle of the Tile's multiframe fit to 2MASS position reference stars.  
applypr %1d ---- no The flag indicating whether the Tile's multiframe position fit was applied to the source data; 0 = no, 1 = yes.  
qual_coadd %2d ---- no This integer indicates the quality score value for the Tile, with values of 0 (poor quality) or 10 (high quality). All Atlas Tiles have received quality scores of 10. The value is determined by the minimum of the quality factors qc_fact, qa_fact, and qi_fact, multiplied by ten.  
qc_fact %3.1f ---- no This quality factor gauges the quality of completion. If the status value from the Multiframe pipeline was equal to 0 (indicating a problem-free completion), then qc=1.0. Otherwise, qc=0.0 because the coadd failed to complete processing. All Atlas Tiles have received qc values of 1.0.  
qi_fact %3.1f ---- no This quality factor gauges the image shape quality. It checks for potential image smearing by using the axial ratio of the PSF calculated from a subset of sources in the Tile. The value of qi is 1.0 if the axial ratio b/a > 0.60; otherwise it is 0.0. All Atlas Tiles have received qi values of 1.0.  
qa_fact %3.1f ---- no This 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. All Atlas Tiles have received qa values of 1.0.  
w1flxwtdx %11.7f ---- no Source astrometry can be measured from WISE images downloaded from the WISE archive. This astrometry is different from that listed in the WISE catalog. The parameter, w1flxwtdx, indicates this difference along X-direction in band 1, between WISE catalog and the astrometry measured from images.  
w1flxwtudx %11.7f ---- no 1 sigma uncertainty in w1flxwtdx, in WISE band 1.  
w1flxtsdx %11.7f ---- no signal-to-noise ratio in w1flxwtdx, in WISE band 1.  
w1flxwtdy %11.7f ---- no Source astrometry can be measured from WISE images downloaded from the WISE archive. This astrometry is different from that listed in the WISE catalog. The parameter, w1flxwtdy, indicates this difference along Y-direction in band 1, between WISE catalog and the astrometry measured from images.  
w1flxwtudy %11.7f ---- no 1 sigma uncertainty in w1flxwtdy, in WISE band 1.  
w1flxwtsdy %11.7f ---- no signal-to-noise ratio in w1flxwtdy, in WISE band 1.  
w2flxwtdx %11.7f ---- no Source astrometry can be measured from WISE images downloaded from the WISE archive. This astrometry is different from that listed in the WISE catalog. The parameter, w2flxwtdx, indicates this difference along X-direction in band 2, between WISE catalog and the astrometry measured from images.  
w2flxwtudx %11.7f ---- no 1 sigma uncertainty in w2flxwtdx, in WISE band 2.  
w2flxwtsdx %11.7f ---- no signal-to-noise ratio in w2flxwtdx, in WISE band 2.  
w2flxwtdy %11.7f ---- no Source astrometry can be measured from WISE images downloaded from the WISE archive. This astrometry is different from that listed in the WISE catalog. The parameter, w2flxwtdy, indicates this difference along Y-direction in band 2, between WISE catalog and the astrometry measured from images.  
w2flxwtudy %11.7f ---- no 1 sigma uncertainty in w2flxwtdy, in WISE band 2.  
w2flxwtsdy %11.7f ---- no signal-to-noise ratio in w2flxwtdy, in WISE band 2.  
w3flxwtdx %11.7f ---- no Source astrometry can be measured from WISE images downloaded from the WISE archive. This astrometry is different from that listed in the WISE catalog. The parameter, w3flxwtdx, indicates this difference along X-direction in band 3, between WISE catalog and the astrometry measured from images.  
w3flxwtudx %11.7f ---- no 1 sigma uncertainty in w3flxwtdx, in WISE band 3.  
w3flxwtsdx %11.7f ---- no signal-to-noise ratio in w3flxwtdx, in WISE band 3.  
w3flxwtdy %11.7f ---- no Source astrometry can be measured from WISE images downloaded from the WISE archive. This astrometry is different from that listed in the WISE catalog. The parameter, w3flxwtdy, indicates this difference along Y-direction in band 3, between WISE catalog and the astrometry measured from images.  
w3flxwtudy %11.7f ---- no 1 sigma uncertainty in w3flxwtdy, in WISE band 3.  
w3flxwtsdy %11.7f ---- no signal-to-noise ratio in w3flxwtdy, in WISE band 3.  
w3flxwtdy %11.7f ---- no Source astrometry can be measured from WISE images downloaded from the WISE archive. This astrometry is different from that listed in the WISE catalog. The parameter, w3flxwtdy, indicates this difference along Y-direction in band 3, between WISE catalog and the astrometry measured from images.  
w4flxwtudx %11.7f ---- no 1 sigma uncertainty in w4flxwtdx, in WISE band 4.  
w4flxwtsdx %11.7f ---- no signal-to-noise ratio in w4flxwtdx, in WISE band 4.  
w4flxwtdy %11.7f ---- no Source astrometry can be measured from WISE images downloaded from the WISE archive. This astrometry is different from that listed in the WISE catalog. The parameter, w4flxwtdy, indicates this difference along Y-direction in band 4, between WISE catalog and the astrometry measured from images.  
w4flxwtudy %11.7f ---- no 1 sigma uncertainty in w4flxwtdy, in WISE band 4.  
w4flxwtsdy %11.7f ---- no signal-to-noise ratio in w4flxwtdy, in WISE band 4.  
load_id %5i --- no Unique integer which identifies the data load ingested into the IRSA database  
cntr %12d ---- no Unique sequential identification number for the metadata table entry.  


Last update: 15 November 2013


previous page   back to table of contents   next page