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(The bold columns are indexed columns)
Column NameDescriptionDatatype
alf_depthMedian ALLFRAME depth across all chips, instrumental magsREAL
alf_nsourcesTotal number of DAOPHOT/ALLFRAME sources in frameINTEGER
apcorAperture correctionREAL
badsolnDid we have a good transformation equation/solution for these dataSMALLINT
dao_depthMedian ALLSTAR depth across all chips, instrumental magsREAL
dao_nsourcesTotal number of DAOPHOT/ALLSTAR sources in frameINTEGER
dao_psfchiMedian DAOPHOT PSF chi value across all chipsREAL
dateobsObservation timestamp: YYYY-MM-DDTHH:MM:SS.SSSSSSCHAR
decDeclination at center of frame (in degrees)DOUBLE
ebvMedian SFD E(B-V) across frameREAL
expnumEight-digit exposure numberCHAR
exptimeExposure time in secondsREAL
filterFilter, u, g, r, i, or zCHAR
fwhmFWHM of PSF (i.e. seeing) in pixels, median across chipsREAL
gaiawcsrmsRMS in WCS fit w.r.t. GAIA catalog in arcsec, median of chipsREAL
htm9HTM index (order 9 => ~10 arcmin size)BIGINT
mjdObservation Modified Julian DateDOUBLE
nchipsNumber of chips with good data for this exposure, normally 60 or 61INTEGER
night_mjdNight Modified Julian Date (integer)INTEGER
photometricIs this from a photometric nightSMALLINT
raRight ascension at center of frame (in degrees)DOUBLE
skymodeMedian sky background level across chipsREAL
skysigMedian sigma in sky background across chipsREAL
wcsrmsRMS in WCS fit w.r.t. ref catalog in arcsec, median of chipsREAL
wcstypeWCS type, always TPVCHAR