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Table: nsc_dr2.exposure
(The bold columns are indexed columns)
Column NameDescriptionDatatype
airmassAirmassREAL
dateobsObservation timestamp. YYYY-MM-DDTHH:MM:SS.SSSSSSCHAR
decDeclination at center of frame, in degreesDOUBLE
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 exposureREAL
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 frame, 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
nchipsNumber of chips with data for this exposureSMALLINT
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 exposureINTEGER
nrefmatchNumber of photometric reference sources matchedINTEGER
raRight ascension at center of frame, in degreesDOUBLE
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
zptermZero-point offset used for this exposureREAL
zptermerrUncertainty of ZPTERMREAL
zptermsigRMS scatter of zero-point offset from multiple reference sourcesREAL
zptypeCalibration type: 1-external reference catalogs, 2-other NSC exposuresSMALLINT
zptypeCalibration type: 1-external reference catalogs, 2-other NSC exposuresSMALLINT


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