The starting point for the PS1 data archive is at Pan-STARRS1 data archive home page.
Description: Contains single epoch photometry of individual detections from a single exposure. The identifiers connecting the detection 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. uniquePspsP2id dimensionless BIGINT 8 NA Unique internal PSPS detection 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. imageID dimensionless BIGINT 8 NA Unique image identifier. Constructed as (100 * frameID + ccdID). randomDetID dimensionless FLOAT 8 NA Random value drawn from the interval between zero and one. 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. xPos raw pixels REAL 4 -999 PSF x center location. yPos raw pixels REAL 4 -999 PSF y center location. xPosErr raw pixels REAL 4 -999 Error in PSF x center location. yPosErr raw pixels REAL 4 -999 Error in PSF y center location. pltScale arcsec/pixel REAL 4 -999 Local plate scale at this location. posAngle degrees REAL 4 -999 Position angle (sky-to-chip) at this location. ra degrees FLOAT 8 -999 Right ascension. dec degrees FLOAT 8 -999 Declination. raErr arcsec REAL 4 -999 Right ascension error. decErr arcsec REAL 4 -999 Declination error. extNSigma dimensionless REAL 4 0 An extendedness measure based on the deviation between PSF and Kron (1980) magnitudes, normalized by the PSF magnitude uncertainty. 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. psfFlux Janskys REAL 4 -999 Flux from PSF fit. psfFluxErr Janskys REAL 4 -999 Error on flux from PSF fit. psfMajorFWHM arcsec REAL 4 -999 PSF major axis FWHM. psfMinorFWHM arcsec REAL 4 -999 PSF minor axis FWHM. psfTheta degrees REAL 4 -999 PSF major axis orientation. psfCore dimensionless REAL 4 -999 PSF core parameter k, where F = F0 / (1 + k r^2 + r^3.33). psfQf dimensionless REAL 4 -999 PSF coverage factor. psfQfPerfect dimensionless REAL 4 -999 PSF weighted fraction of pixels totally unmasked. psfChiSq dimensionless REAL 4 -999 Reduced chi squared value of the PSF model fit. psfLikelihood dimensionless REAL 4 -999 Likelihood that this detection is best fit by a PSF. momentXX arcsec^2 REAL 4 -999 Second moment M_xx. momentXY arcsec^2 REAL 4 -999 Second moment M_xy. momentYY arcsec^2 REAL 4 -999 Second moment M_yy. momentR1 arcsec REAL 4 -999 First radial moment. momentRH arcsec^0.5 REAL 4 -999 Half radial moment (r^0.5 weighting). momentM3C arcsec^2 REAL 4 -999 Cosine of trefoil second moment term: r^2 cos(3 theta) = M_xxx - 3 * M_xyy. momentM3S arcsec^2 REAL 4 -999 Sine of trefoil second moment: r^2 sin (3 theta) = 3 * M_xxy - M_yyy. momentM4C arcsec^2 REAL 4 -999 Cosine of quadrupole second moment: r^2 cos (4 theta) = M_xxxx - 6 * M_xxyy + M_yyyy. momentM4S arcsec^2 REAL 4 -999 Sine of quadrupole second moment: r^2 sin (4 theta) = 4 * M_xxxy - 4 * M_xyyy. apFlux Janskys REAL 4 -999 Flux in seeing-dependent aperture. apFluxErr Janskys REAL 4 -999 Error on flux in seeing-dependent aperture. apFillF dimensionless REAL 4 -999 Aperture fill factor. apRadius arcsec REAL 4 -999 Aperture radius. kronFlux Janskys REAL 4 -999 Kron (1980) flux. kronFluxErr Janskys REAL 4 -999 Error on Kron (1980) flux. kronRad arcsec REAL 4 -999 Kron (1980) radius. sky Janskys/arcsec^2 REAL 4 -999 Background sky level. skyErr Janskys/arcsec^2 REAL 4 -999 Error in background sky level. infoFlag dimensionless BIGINT 8 0 Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags. infoFlag2 dimensionless INT 4 0 Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags2. infoFlag3 dimensionless INT 4 0 Information flag bitmask indicating details of the photometry. Values listed in DetectionFlags3. processingVersion dimensionless TINYINT 1 NA Data release version.
