The starting point for the PS1 data archive is at Pan-STARRS1 data archive home page.
Description: Contains single epoch forced photometry of individual measurements of objects detected in the stacked images. The identifiers connecting the measurement back to the original image and to the object association are provided. PSF, aperture, and Kron (1980) photometry are included, along with sky and detector coordinate positions. References: Kron, R. G. 1980, ApJS, 43, 305. Name Unit Data Type Size Default Value Description objID dimensionless BIGINT 8 NA Unique object identifier. uniquePspsFWid dimensionless BIGINT 8 NA Unique internal PSPS forced warp identifier. detectID dimensionless BIGINT 8 NA Unique detection identifier. ippObjID dimensionless BIGINT 8 NA IPP internal object identifier. ippDetectID dimensionless BIGINT 8 NA IPP internal detection identifier. filterID dimensionless TINYINT 1 NA Filter identifier. Details in the Filter table. surveyID dimensionless TINYINT 1 NA Survey identifier. Details in the Survey table. forcedSummaryID dimensionless BIGINT 8 NA Unique forced warp summary identifier. forcedWarpID dimensionless BIGINT 8 NA Unique forced warp identifier. randomWarpID dimensionless FLOAT 8 NA Random value drawn from the interval between zero and one. 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. dvoRegionID dimensionless INT 4 -1 Internal DVO region identifier. obsTime days FLOAT 8 -999 Modified Julian Date at the midpoint of the observation. Note these are international atomic time rather than UTC, so if you want UTC times you will need to add 34 or 35 seconds to correct for leap seconds. zp magnitudes REAL 4 0 Photometric zeropoint. Necessary for converting listed fluxes and magnitudes back to measured ADU counts. telluricExt magnitudes REAL 4 NA Estimated Telluric extinction due to non-photometric observing conditions. Necessary for converting listed fluxes and magnitudes back to measured ADU counts. expTime seconds REAL 4 -999 Exposure time of the frame/exposure. Necessary for converting listed fluxes and magnitudes back to measured ADU counts. airMass dimensionless REAL 4 0 Airmass at midpoint of the exposure. Necessary for converting listed fluxes and magnitudes back to measured ADU counts. FpsfFlux Janskys REAL 4 -999 PSF flux. FpsfFluxErr Janskys REAL 4 -999 Error in PSF flux. xPosChip raw pixels REAL 4 -999 PSF x position in original chip pixels. yPosChip raw pixels REAL 4 -999 PSF y position in original chip pixels. FccdID dimensionsless SMALLINT 2 -999 OTA identifier of original chip (see ImageMeta). FpsfMajorFWHM arcsec REAL 4 -999 PSF major axis FWHM. FpsfMinorFWHM arcsec REAL 4 -999 PSF minor axis FWHM. FpsfTheta degrees REAL 4 -999 PSF major axis orientation. FpsfCore dimensionless REAL 4 -999 PSF core parameter k, where F = F0 / (1 + k r^2 + r^3.33). FpsfQf dimensionless REAL 4 -999 PSF coverage factor. FpsfQfPerfect dimensionless REAL 4 -999 PSF weighted fraction of pixels totally unmasked. FpsfChiSq dimensionless REAL 4 -999 Reduced chi squared value of the PSF model fit. FmomentXX arcsec^2 REAL 4 -999 Second moment M_xx. FmomentXY arcsec^2 REAL 4 -999 Second moment M_xy. FmomentYY arcsec^2 REAL 4 -999 Second moment M_yy. FmomentR1 arcsec REAL 4 -999 First radial moment. FmomentRH arcsec^0.5 REAL 4 -999 Half radial moment (r^0.5 weighting). FmomentM3C arcsec^2 REAL 4 -999 Cosine of trefoil second moment term: r^2 cos(3 theta) = M_xxx - 3 * M_xyy. FmomentM3S arcsec^2 REAL 4 -999 Sine of trefoil second moment: r^2 sin (3 theta) = 3 * M_xxy - M_yyy. FmomentM4C arcsec^2 REAL 4 -999 Cosine of quadrupole second moment: r^2 cos (4 theta) = M_xxxx - 6 * M_xxyy + M_yyyy. FmomentM4S arcsec^2 REAL 4 -999 Sine of quadrupole second moment: r^2 sin (4 theta) = 4 * M_xxxy - 4 * M_xyyy. FapFlux Janskys REAL 4 -999 Aperture flux. FapFluxErr Janskys REAL 4 -999 Error in aperture flux. FapFillF dimensionless REAL 4 -999 Aperture fill factor. FapRadius arcsec REAL 4 -999 Aperture radius for forced warp detection. FkronFlux Janskys REAL 4 -999 Kron (1980) flux. FkronFluxErr Janskys REAL 4 -999 Error in Kron (1980) flux. FkronRad arcsec REAL 4 -999 Kron (1980) radius. Fsky Janskys/arcsec^2 REAL 4 -999 Background sky level. FskyErr Janskys/arcsec^2 REAL 4 -999 Error in background sky level. FinfoFlag dimensionless BIGINT 8 0 Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags. FinfoFlag2 dimensionless INT 4 0 Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags2. FinfoFlag3 dimensionless INT 4 0 Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags3. processingVersion dimensionless TINYINT 1 NA Data release version.
