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Table: nsc_dr2.chip
(The bold columns are indexed columns)
Column NameDescriptionDatatype
airmassAirmassREAL
ccdnumCCD numberSMALLINT
dateobsObservation timestamp. YYYY-MM-DDTHH:MM:SS.SSSSSSCHAR
decDeclination at center of chip, in degreesDOUBLE
dec_coef1DEC correction term 1: constant offset termDOUBLE
dec_coef2DEC correction term 2: delta_RA linear termDOUBLE
dec_coef3DEC correction term 3: delta_RA x delta_DEC cross termDOUBLE
dec_coef4DEC correction term 4: delta_DEC linear termDOUBLE
decrmsRMS in WCS fit for DEC with respect to Gaia reference starsREAL
decstderrStandard error of WCS fit for DEC with respect to Gaia reference starsREAL
depth10sig10 sigma magnitude depthREAL
depth9595th percentile magnitude depthREAL
ebvMedian SFD E(B-V) of sources in this chipREAL
elatEcliptic LatitudeDOUBLE
elonEcliptic LongitudeDOUBLE
expnumExposure numberINTEGER
exposureExposure nameCHAR
exptimeExposure time, in secondsREAL
filterFilter (u, g, r, i, z, Y, VR)CHAR
fwhmMedian FWHM of PSF (i.e. seeing) of chip, in arcsecondsREAL
glatGalactic LatitudeDOUBLE
glonGalactic LongitudeDOUBLE
htm9Ninth level (~10 arcmin resolution) Hierarchical Triangular Mesh index (Szalay et al. 2007)INTEGER
instrumentInstrument name (c4d, k4m, ksb)CHAR
mjdObservation Modified Julian DateDOUBLE
nest4096Nested-scheme HEALPix (Gorski et al. 2005) index with NSIDE=4096 (~1 arcmin resolution)INTEGER
ngaiamatchNumber of Gaia astrometric reference sources matchedINTEGER
nmeasNumber of good measurements in this chipINTEGER
nrefmatchNumber of photometric reference sources matched for chipINTEGER
raRight ascension at center of chip, in degreesDOUBLE
ra_coef1RA correction term 1: constant offset termDOUBLE
ra_coef2RA correction term 2: delta_RA linear termDOUBLE
ra_coef3RA correction term 3: delta_RA x delta_DEC cross termDOUBLE
ra_coef4RA correction term 4: delta_DEC linear termDOUBLE
rarmsRMS in WCS fit for RA with respect to Gaia reference starsREAL
rastderrStandard error of WCS fit for RA with respect to Gaia reference starsREAL
ring256Ring-scheme HEALPix (Gorski et al. 2005) index with NSIDE=256 (~14 arcmin resolution)INTEGER
vertex_dec1First DEC value for the four corners of the chipDOUBLE
vertex_dec2Second DEC value for the four corners of the chipDOUBLE
vertex_dec3Third DEC value for the four corners of the chipDOUBLE
vertex_dec4Fourth DEC value for the four corners of the chipDOUBLE
vertex_ra1First RA value for the four corners of the chipDOUBLE
vertex_ra2Second RA value for the four corners of the chipDOUBLE
vertex_ra3Third RA value for the four corners of the chipDOUBLE
vertex_ra4Fourth RA value for the four corners of the chipDOUBLE
zptermChip-level zero-point offset used to estimate spatial variation of zeropointREAL
zptermerrUncertainty of CHIPZPTERMREAL


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