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(The bold columns are indexed columns)
Column NameDescriptionDatatype
cameraThe camera that took this image, e.g. decamCHAR
ccddecoffMedian astrometric offset for the CCD in arcsec.REAL
ccddecrmsrms in astrometric offset for the CCDREAL
ccdnameCCD name (see DECam layout), e.g. N10 or S7CHAR
ccdphrmsPhotometric rms for the CCD (in mag).REAL
ccdraoffMedian astrometric offset for the CCD in arcsec.REAL
ccdrarmsrms in astrometric offset for the CCDREAL
ccdskycountsMean sky count level per pixel in the CP-processed frames measured (with iterative rejection) for each CCD in the image section [500:1500,1500:2500]REAL
ccdzptZeropoint for the CCD (AB mag).REAL
cd1_1Astrometric header value: transformation matrix.REAL
cd1_2Astrometric header value: transformation matrix.REAL
cd2_1Astrometric header value: transformation matrix.REAL
cd2_2Astrometric header value: transformation matrix.REAL
crpix1Astrometric header value: X reference pixel.REAL
crpix2Astrometric header value: Y reference pixel.REAL
crval1Astrometric header value: RA of reference pixel.DOUBLE
crval2Astrometric header value: Dec of reference pixel.DOUBLE
decApproximate Dec center of this CCD (deg).DOUBLE
dec_boreTelescope boresight Dec of this exposure (deg).DOUBLE
expnumUnique DECam exposure number, e.g. 348244INTEGER
exptimeExposure time in seconds, e.g. 30REAL
filterFilter used for observation, e.g. g, r, zCHAR
fwhm[use seeing instead]REAL
heightHeight in pixels of this image, eg 4096.SMALLINT
image_filenamePath to FITS image, eg decam/CP20140810_g_v2/c4d_140815_235218_ooi_g_v2.fits.fz.CHAR
image_hduFITS HDU number in the image_filename file where this image can be found.SMALLINT
mjd_obsDate of observation in MJD (in UTC system), eg 56884.99373389.DOUBLE
objectName listed in the object tag from the CCD headerCHAR
propidNOAO Proposal ID that took this image, eg 2014B-0404.CHAR
raApproximate RA center of this CCD (deg).DOUBLE
ra_boreTelescope boresight RA of this exposure (deg).DOUBLE
widthWidth in pixels of this image, eg 2046.SMALLINT
zptMedian zero point for the entire image (median of all CCDs of the image), eg 25.0927.REAL