The starting point for the PS1 data archive is at Pan-STARRS1 data archive home page.
Description: Contains the single epoch forced photometry fluxes within the SDSS R5 (r = 3.00 arcsec), R6 (r = 4.63 arcsec), and R7 (r = 7.43 arcsec) apertures (Stoughton 2003) for objects detected in the stacked images. References: Stoughton, C., Lupton, R. H., Bernardi, M., et al. 2003, AJ, 123, 485. 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. 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. flxR5 Janskys REAL 4 -999 Flux from forced photometry measurement within an aperture of radius r = 3.00 arcsec. flxR5Err Janskys REAL 4 -999 Error in flux from forced photometry measurement within an aperture of radius r = 3.00 arcsec. flxR5Std Janskys REAL 4 -999 Standard deviation of flux from forced photometry measurement within an aperture of radius r = 3.00 arcsec. flxR5Fill dimensionless REAL 4 -999 Aperture fill factor for forced photometry measurement within an aperture of radius r = 3.00 arcsec. flxR6 Janskys REAL 4 -999 Flux from forced photometry measurement within an aperture of radius r = 4.63 arcsec. flxR6Err Janskys REAL 4 -999 Error in flux from forced photometry measurement within an aperture of radius r = 4.63 arcsec. flxR6Std Janskys REAL 4 -999 Standard deviation of flux from forced photometry measurement within an aperture of radius r = 4.63 arcsec. flxR6Fill dimensionless REAL 4 -999 Aperture fill factor for forced photometry measurement within an aperture of radius r = 4.63 arcsec. flxR7 Janskys REAL 4 -999 Flux from forced photometry measurement within an aperture of radius r = 7.43 arcsec. flxR7Err Janskys REAL 4 -999 Error in flux from forced photometry measurement within an aperture of radius r = 7.43 arcsec. flxR7Std Janskys REAL 4 -999 Standard deviation of flux from forced photometry measurement within an aperture of radius r = 7.43 arcsec. flxR7Fill dimensionless REAL 4 -999 Aperture fill factor for forced photometry measurement within an aperture of radius r = 7.43 arcsec.