II. User's Guide to the WISE Preliminary Data Release

4. Ancillary Products

e. Atlas Metadata Table Format

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 ("a" = Preliminary)
    • e - Sky coverage epoch ("1" = first)
    • v - Processing version.

    The disambiguation string is always aa11 for Tiles in the WISE Preliminary Data Release.

For example, the identifier of the Atlas Tile with center at (α,δ = 304.13896,-13.63000) is 3041m137_aa11.

  
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_aa11 was started at 2010-11-07 01:06:31.  
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.  
status %3d ---- 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.  
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 y-axis West of North at the EQUINOX in the opposite direction of the conventional Position Angle, where position angle (P.A.) = -CROTA.  
width %11.7f deg no The width or size of the Atlas image in degrees.  
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.  
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.  
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 ---- no The median depth-of-coverage per pixel for the full Atlas Image footprint for band 1.  
w2covmedian %12.6f ---- no The median depth-of-coverage per pixel for the full Atlas Image footprint for band 2.  
w3covmedian %12.6f ---- no The median depth-of-coverage per pixel for the full Atlas Image footprint for band 3.  
w4covmedian %12.6f ---- no The median depth-of-coverage per pixel for the full Atlas Image footprint Tile for band 4.  
w1fiveptile %12.6f/td> ---- no The pixel value corresponding to the 5th percentile in the Tile's depth-of-coverage map for band 1.  
w2fiveptile %12.6f/td> ---- no The pixel value corresponding to the 5th percentile in the Tile's depth-of-coverage map for band 2.  
w3fiveptile %12.6f/td> ---- no The pixel value corresponding to the 5th percentile in the Tile's depth-of-coverage map for band 3.  
w4fiveptile %12.6f/td> ---- no The pixel value corresponding to the 5th percentile in the Tile's depth-of-coverage map for band 4.  
w1ninefiveptile %12.6f ---- no The pixel value corresponding to the 95th percentile in the Tile's depth-of-coverage map for band 1.  
w2ninefiveptile %12.6f ---- no The pixel value corresponding to the 95th percentile in the Tile's depth-of-coverage map for band 2.  
w3ninefiveptile %12.6f ---- no The pixel value corresponding to the 95th percentile in the Tile's depth-of-coverage map for band 3.  
w4ninefiveptile %12.6f ---- no The pixel value corresponding to the 95th percentile in the Tile's depth-of-coverage map for band 4.  
w1median_22 %12.6f DN no The median pixel value for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 1.  
w2median_22 %12.6f DN no The median pixel value for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 2.  
w3median_22 %12.6f DN no The median pixel value for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 3.  
w4median_22 %12.6f DN no The median pixel value for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 4.  
w1mode_22 %12.6f DN no 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 no 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 no 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 no The approximate modal pixel value for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 4.  
w1stddev_22 %12.6f DN no An unbiased estimate of the population standard-deviation (RMS deviation from the mean) for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 1.  
w2stddev_22 %12.6f DN no An unbiased estimate of the population standard-deviation (RMS deviation from the mean) for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 2.  
w3stddev_22 %12.6f DN no An unbiased estimate of the population standard-deviation (RMS deviation from the mean) for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 3.  
w2stddev_22 %12.6f DN no An unbiased estimate of the population standard-deviation (RMS deviation from the mean) for the central square partition of a 3x3 grid over the Atlas Image intensity map for band 4.  
w1numatmedcov_22 %8d ---- no The number of pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w2numatmedcov_22 %8d ---- no The number of pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 2. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w3numatmedcov_22 %8d ---- no The number of pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 3. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w4numatmedcov_22 %8d ---- no The number of pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 4. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w1sigltmadmed_22 %12.6f DN no The lower-tail median absolute deviation from the median (a robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w2sigltmadmed_22 %12.6f DN no The lower-tail median absolute deviation from the median (a robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 2. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w3sigltmadmed_22 %12.6f DN no The lower-tail median absolute deviation from the median (a robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 3. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w4sigltmadmed_22 %12.6f DN no The lower-tail median absolute deviation from the median (a robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 4. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w1sigltstdmod_22 %12.6f DN no The lower-tail trimmed standard-deviation from the mode (another robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w2sigltstdmod_22 %12.6f DN no The lower-tail trimmed standard-deviation from the mode (another robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 2. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w3sigltstdmod_22 %12.6f DN no The lower-tail trimmed standard-deviation from the mode (another robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 3. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w4sigltstdmod_22 %12.6f DN no The lower-tail trimmed standard-deviation from the mode (another robust estimate of sigma) for intensity pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 4. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w1med16ptile_22 %12.6f DN no A robust estimate of sigma using the difference of 50th - 16th percentile values for intensity pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w2med16ptile_22 %12.6f DN no A robust estimate of sigma using the difference of 50th - 16th percentile values for intensity pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 2. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w3med16ptile_22 %12.6f DN no A robust estimate of sigma using the difference of 50th - 16th percentile values for intensity pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 3. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w4med16ptile_22 %12.6f DN no A robust estimate of sigma using the difference of 50th - 16th percentile values for intensity pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 4. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w184_16ptile_22 %12.6f DN no A robust proxy for the standard deviation in pixel values in the central region of the Tile in band 1 as measured by half the percentile range: 84% - 16%. Only pixels with depth-of-coverage within an interval of ± 0.25 of the median depth are used.  
w284_16ptile_22 %12.6f DN no A robust proxy for the standard deviation in pixel values in the central region of the Tile in band 2 as measured by half the percentile range: 84% - 16%. Only pixels with depth-of-coverage within an interval of ± 0.25 of the median depth are used.  
w384_16ptile_22 %12.6f DN no A robust proxy for the standard deviation in pixel values in the central region of the Tile in band 3 as measured by half the percentile range: 84% - 16%. Only pixels with depth-of-coverage within an interval of ± 0.25 of the median depth are used.  
w484_16ptile_22 %12.6f DN no A robust proxy for the standard deviation in pixel values in the central region of the Tile in band 4 as measured by half the percentile range: 84% - 16%. Only pixels with depth-of-coverage within an interval of ± 0.25 of the median depth are used.  
w1mdatmedcov_22 %12.6f DN no Median pixel value in the uncertainty image map for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. ( If the median depth-of-coverage is 8.0, it uses the pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w2mdatmedcov_22 %12.6f DN no Median pixel value in the uncertainty image map for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 2. ( If the median depth-of-coverage is 8.0, it uses the pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w3mdatmedcov_22 %12.6f DN no Median pixel value in the uncertainty image map for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 3. ( If the median depth-of-coverage is 8.0, it uses the pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w4mdatmedcov_22 %12.6f DN no Median pixel value in the uncertainty image map for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 4. ( If the median depth-of-coverage is 8.0, it uses the pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w1ltmadmed_unc_22 %12.6f ---- no The ratio of w1sigltmadmed_22/w1mdatmedcov_22, i.e. a pseudo-χ2 measure for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w2ltmadmed_unc_22 %12.6f ---- no The ratio of w2sigltmadmed_22/w2mdatmedcov_22, i.e. a pseudo-χ2 measure for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 2. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w3ltmadmed_unc_22 %12.6f ---- no The ratio of w3sigltmadmed_22/w3mdatmedcov_22, i.e. a pseudo-χ2 measure for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 3. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w4ltmadmed_unc_22 %12.6f ---- no The ratio of w4sigltmadmed_22/w4mdatmedcov_22, i.e. a pseudo-χ2 measure for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 4. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w1md16ptile_unc_22 %12.6f ---- no The ratio of w1med16ptile_22/w1mdatmedcov_22, i.e. a pseudo-χ2 measure for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w2md16ptile_unc_22 %12.6f ---- no The ratio of w2med16ptile_22/w2mdatmedcov_22, i.e. a pseudo-χ2 measure for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w3md16ptile_unc_22 %12.6f ---- no The ratio of w3med16ptile_22/w3mdatmedcov_22, i.e. a pseudo-χ2 measure for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w4md16ptile_unc_22 %12.6f ---- no The ratio of w4med16ptile_22/w4mdatmedcov_22, i.e. a pseudo-χ2 measure for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w1ltstdmod_unc_22 %12.6f ---- no The ratio of w1sigltstdmod_22/w1mdatmedcov_22, i.e. a pseudo-χ2 measure for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 1. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w2ltstdmod_unc_22 %12.6f ---- no The ratio of w2sigltstdmod_22/w2mdatmedcov_22, i.e. a pseudo-χ2 measure for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 2. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w3ltstdmod_unc_22 %12.6f ---- no The ratio of w3sigltstdmod_22/w3mdatmedcov_22, i.e. a pseudo-χ2 measure for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 3. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w4ltstdmod_unc_22 %12.6f ---- no The ratio of w4sigltstdmod_22/w4mdatmedcov_22, i.e. a pseudo-χ2 measure for pixels with depth-of-coverage within the interval of the median ± 0.25 in the central square partition of a 3x3 grid over the Atlas Image footprint, for band 4. ( If the median depth-of-coverage is 8.0, the number of pixels with depth-of-coverages from 7.75 to 8.25 in the central square partition.)  
w1medflag %10.1f ---- no 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 ---- no 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 ---- no 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 ---- no 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 ---- no 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 ---- no 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 ---- no 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 ---- no The median number of temporal outlier pixels per frame, calculated over all "good" frames that contributed to the Atlas Image for band 4.  
w1stdfrmmedb %12.6f DN no The standard deviation in the global frame median pixel values before background matching, calculated over all "good" frames that contributed to the Atlas Image for band 1.  
w2stdfrmmedb %12.6f DN no The standard deviation in the global frame median pixel values before background matching, calculated over all "good" frames that contributed to the Atlas Image for band 2.  
w3stdfrmmedb %12.6f DN no The standard deviation in the global frame median pixel values before background matching, calculated over all "good" frames that contributed to the Atlas Image for band 3.  
w4stdfrmmedb %12.6f DN no The standard deviation in the global frame median pixel values before background matching, calculated over all "good" frames that contributed to the Atlas Image for band 4.  
w1stdfrmmeda %12.6f DN no The standard deviation in the global frame median pixel values after background matching, calculated over all "good" frames that contributed to the Atlas Image for band 1.  
w2stdfrmmeda %12.6f DN no The standard deviation in the global frame median pixel values after background matching, calculated over all "good" frames that contributed to the Atlas Image for band 2.  
w3stdfrmmeda %12.6f DN no The standard deviation in the global frame median pixel values after background matching, calculated over all "good" frames that contributed to the Atlas Image for band 3.  
w4stdfrmmeda %12.6f DN no The standard deviation in the global frame median pixel values after background matching, calculated over all "good" frames that contributed to the Atlas Image for band 4.  
nf %6d ---- no The number of single-exposure image frames processed to make the coadd Tile.  
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.  
w3npn %2d ---- no 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 ---- no 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.  
w1cozero %8.4f mag no 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.  
w2cozero %8.4f mag no 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.  
w3cozero %8.4f mag no 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.  
w4cozero %8.4f mag no 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.  
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 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.  
w3stap %6.3f arcsec no The radius in arcseconds of the standard circular aperture used for aperture photometry in band 3, nominally 8.25 arcseconds.  
w4stap %6.3f arcsec no 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 ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 for band 1.  
w2n3sig %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 for band 2.  
w3n3sig %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 for band 3.  
w4n3sig %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 for band 4.  
w1n3sig_only %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in band 1 only.  
w2n3sig_only %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in band 2 only.  
w3n3sig_only %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in band 3 only.  
w1n3sig_only %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in band 4 only.  
n12 %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 1 and 2.  
n13 %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 1 and 3.  
n14 %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 1 and 4.  
n23 %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 2 and 3.  
n24 %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 2 and 4.  
n34 %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 3 and 4.  
n123 %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 1, 2 and 3.  
n124 %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 1, 2 and 4.  
n234 %7d ---- no The number of sources in the Tile whose profile-fit photometry have SNR > 3 in bands 2, 3 and 4.  
n1234 %7d ---- no 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 ---- 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.  
w3n_rdiff %6d ---- no The number of real sources which are flagged as contaminated by diffraction spikes in band 3.  
w4n_rdiff %6d ---- no The number of real sources which are flagged as contaminated by diffraction spikes in band 4.  
w1n_rlatent %6d ---- no The number of real sources which are flagged as contaminated by latents in band 1.  
w2n_rlatent %6d ---- no The number of real sources which are flagged as contaminated by latents in band 2.  
w3n_rlatent %6d ---- no The number of real sources which are flagged as contaminated by latents in band 3.  
w4n_rlatent %6d ---- no The number of real sources which are flagged as contaminated by latents in band 4.  
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.  
w3n_rhalo %6d ---- no The number of real sources which are flagged as contaminated by halos in band 3.  
w4n_rhalo %6d ---- no The number of real sources which are flagged as contaminated by halos in band 4.  
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.  
w3n_roghost %6d ---- no The number of real sources which are flagged as contaminated by optical ghosts in band 3.  
w4n_roghost %6d ---- no The number of real sources which are flagged as contaminated by optical ghosts in band 4.  
w1n_sdiff %6d ---- no 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 ---- no 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 ---- no 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 ---- no 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_slatent %6d ---- no The number of sources which are flagged as spurious detections of latents in band 1. None of these sources will be found in the Source Catalog.  
w2n_slatent %6d ---- no The number of sources which are flagged as spurious detections of latents in band 2. None of these sources will be found in the Source Catalog.  
w3n_slatent %6d ---- no The number of sources which are flagged as spurious detections of latents in band 3. None of these sources will be found in the Source Catalog.  
w4n_slatent %6d ---- no The number of sources which are flagged as spurious detections of latents in band 4. None of these sources will be found in the Source Catalog.  
w1n_shalo %6d ---- no 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 ---- no 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 ---- no 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 ---- no 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 ---- no 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 ---- no 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 ---- no 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 ---- no 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 ---- 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.  
w3n_rtot %6d ---- no The total number of real sources which are flagged as contaminated by artifacts in band 3.  
w4n_rtot %6d ---- no The total number of real sources which are flagged as contaminated by artifacts in band 4.  
n_rtot %6d ---- no The total number of real sources which are flagged as contaminated by artifacts in any band.  
w1n_stot %6d ---- no 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 ---- no 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 ---- no 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 ---- no 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 ---- no 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.  
qa_status %9s ---- no This string indicates Quality Assurance status for the Tile:
  • "Prelim" means only preliminary Quality Assurance has been performed by the automated QA subsystem;
  • "Reviewed" means the QA data has been examined and scores corrected by a QA team member;
  • "Final" means the QA scores have been finalized. All Atlas Tiles fall into this category.
 
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.  
load_id %4d ---- no A unique integer that identifies the archive data load batch in the archive ingest procedure that contains the Tile.  
cntr %12d ---- no Unique sequential identification number for the metadata table entry.  


Last Update: 2011 April 26

Previous page    Next page
Return to Explanatory Supplement TOC