Data Release 3.1 - 31 January 2017

This is an interim (recovery) data release consisting of 2,257 (~70%) of the full 3,237 fields comprising GPIPS. The missing fields were found to either need reprocessing or reobservations. We believe another 10% can be quickly recovered and posted (as DR3.2), and perhaps another up to 10% might be recovered. We have requested telescope time to reobserve the remaining roughly 10%.

The zip files here represent the current form of the DR3.1 release. We still hope to make the data access VO compliant and mirrored elsewhere, though this will likely happen after the remaining fields have been reprocessed and/or reobserved.

The following files contain entries for the 2,257 fields:

Summary_Table.dat - Text file summary of the general properties of each of the observed fields, including a GP serial number, the nominal Galactic longitude and latitude of the field, the observing run identifier, the night of the observation, the offset of the actual field center (in arcsec) from the nominal pointing center, first image number, the Secular Amplitude (slow variation in night sky transmission - see Clemens+12a), FWHM of the combined photometric image, as well as counts of images observed but judged inadequate for inclusion (Nuse0) and the number included in the analysis (Nok). The final three columns list the sky noise (in %) across the observation set (Clemens+12a), a measure of any image incursion of the autoguider probe, and a figure-of-merit that was used to select among any multiple observations of the field. The highest FOM was chosen for inclusion in the DR3 set.

Observing_Logs.zip - ZIP file containing all the hand-written logs of the observations, taken at the time of observation, for all the GPIPS observing runs and nights. (~1 Gbyte)

POLCATs.zip - ZIP file containing the POLCAT files (~1 Gbyte)

PHOTCATs.zip - same, for the PHOTCATs (~1 Gbyte)

Plots.zip - Postscript files showing images with vector overlays for the high polarization S/N (>2.5) stars (~1 Gbyte)

DS9_Reg_Files.zip - 2 x 2,259 files - DS9-type 'region' files for the images. One set for high polarization S/N, the other for all stars with S/N > 1 (34 Mbytes)

Images.zip - the 2,257 FITS images of the deep coadds for each field (11 GBytes)

The original Images.zip file could not be uploaded to the new gpips0 computer as a single file, so the following 7 files contain the full set of FITS images, in blocks of 500, indexed by the GPIPS field number.

Images for fields 0001 through 0499
Images for fields 0500 through 0999
Images for fields 1000 through 1499
Images for fields 1500 through 1999
Images for fields 2000 through 2499
Images for fields 2500 through 2999
Images for fields 3000 through 3237

At present, individual fields are not available for download, nor are individual star properties. We hope to turn on these features in the future.

Publications resulting from use of GPIPS data must include the required acknowledgement (About > Sponsors).