Description: Contains the metadata describing the stacked image produced from the combination of a set of single epoch exposures. The nature of the stack is given by the StackTypeID. The astrometric and photometric calibration of the stacked image are listed. Name Unit Data Type Size Default Value Description stackImageID dimensionless BIGINT 8 NA Unique stack identifier. batchID dimensionless BIGINT 8 NA Internal database batch identifier. surveyID dimensionless TINYINT 1 NA Survey identifier. Details in the Survey table. filterID dimensionless TINYINT 1 NA Filter identifier. Details in the Filter table. stackTypeID dimensionless TINYINT 1 0 Stack type identifier. Details in the StackType table. tessID dimensionless TINYINT 1 0 Tessellation identifier. Details in the TessellationType table. projectionID dimensionless SMALLINT 2 -1 Projection cell identifier. skyCellID dimensionless TINYINT 1 255 Skycell region identifier. photoCalID dimensionless INT 4 NA Photometric calibration identifier. Details in the PhotoCal table. analysisVer dimensionless VARCHAR(100) 100 IPP software analysis release version. md5sum dimensionless VARCHAR(100) 100 IPP MD5 Checksum. expTime seconds REAL 4 -999 Exposure time of the stack. Necessary for converting listed fluxes and magnitudes back to measured ADU counts. nP2Images dimensionless SMALLINT 2 -999 Number of input exposures/frames contributing to this stack. detectionThreshold magnitudes REAL 4 -999 Reference magnitude for detection efficiency calculation. astroScat dimensionless REAL 4 -999 Measurement of the calibration (not astrometric error) defined to be the sum in quadrature of the standard deviations in the X and Y directions. photoScat dimensionless REAL 4 -999 Photometric scatter relative to reference catalog. nAstroRef dimensionless INT 4 -999 Number of astrometric reference sources. nPhotoRef dimensionless INT 4 -999 Number of photometric reference sources. recalAstroScatX arcsec REAL 4 -999 Measurement of the re-calibration (not astrometric error) in the X direction. recalAstroScatY arcsec REAL 4 -999 Measurement of the re-calibration (not astrometric error) in the Y direction. recalNAstroStars dimensionless INT 4 -999 Number of astrometric reference sources used in recalibration. recalphotoScat magnitudes REAL 4 -999 Photometric scatter relative to reference catalog. recalNPhotoStars dimensionless INT 4 -999 Number of astrometric reference sources used in recalibration. psfModelID dimensionless INT 4 -999 PSF model identifier. psfFWHM arcsec REAL 4 -999 Mean PSF full width at half maximum at image center. psfWidMajor arcsec REAL 4 -999 PSF major axis FWHM at image center. psfWidMinor arcsec REAL 4 -999 PSF minor axis FWHM at image center. psfTheta degrees REAL 4 -999 PSF major axis orientation at image center. photoZero magnitudes REAL 4 -999 Locally derived photometric zero point for this stack. ctype1 dimensionless VARCHAR(100) 100 Name of astrometric projection in right ascension. ctype2 dimensionless VARCHAR(100) 100 Name of astrometric projection in declination. crval1 degrees FLOAT 8 -999 Right ascension corresponding to reference pixel. crval2 degrees FLOAT 8 -999 Declination corresponding to reference pixel. crpix1 sky pixels FLOAT 8 -999 Reference pixel for right ascension. crpix2 sky pixels FLOAT 8 -999 Reference pixel for declination. cdelt1 degrees/pixel FLOAT 8 -999 Pixel scale in right ascension. cdelt2 degrees/pixel FLOAT 8 -999 Pixel scale in declination. pc001001 dimensionless FLOAT 8 -999 Linear transformation matrix element between image pixel x and right ascension. pc001002 dimensionless FLOAT 8 -999 Linear transformation matrix element between image pixel y and right ascension. pc002001 dimensionless FLOAT 8 -999 Linear transformation matrix element between image pixel x and declination. pc002002 dimensionless FLOAT 8 -999 Linear transformation matrix element between image pixel y and declination. processingVersion dimensionless TINYINT 1 NA Data release version.
