Astronomy and Astrophysics – Astronomy
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.1307d&link_type=abstract
American Astronomical Society, 180th AAS Meeting, #13.07; Bulletin of the American Astronomical Society, Vol. 24, p.750
Astronomy and Astrophysics
Astronomy
8
Scientific paper
The second Palomar sky survey (POSS-II) is now under way, using the 48-inch Oschin Schmidt telescope at Palomar Observatory. When completed, the photographic survey will consist of 896 fields spaced at 5(deg) intervals, covering the entire northern sky in three bands: green (IIIa-J), red (IIIa-F), and near-IR (IV-N). At the moment, approximately 50\ plates, 60\ in hand. The survey should be 90 -- 95\ planned that the entire survey will be digitized using the modified PDS plate scanners at ST ScI. A memorandum of understanding has been signed by ST ScI and Caltech to this effect, and the digitization of plates is now in progress. It is anticipated that the completion of the photographic survey and its digitization should roughly coincide. The plates are being digitized with 15-micron ( ~ 1 arcsec) pixels, in rasters 23,040 square. Our plan is to distribute this digital version of the survey to the community, at cost, in a manner similar to the distribution of the glass and film copies of POSS-II, and on a similar time scale. The digital version will probably be distributed on CD-ROM disks, using data compression techniques which yield negligible loss of photometric or astrometric accuracy for well-exposed images. Astrometric plate solutions will be provided for all fields. Photometric CCD calibration efforts are now under way at both ST ScI and Palomar. More details will be given in related posters by Lasker et al. and by Weir et al. The POSS-II is funded by grants to Caltech from the Eastman Kodak Co., the National Geographic Society, the Samuel Oschin Foundation, the NSF grants AST 84-08225 and AST 87-19465, and the NASA grants NGL 05002140 and NAGW 1710. ST ScI is operated by AURA, Inc., under contract to NASA; image compression algorithms at the ST ScI were developed under NASA grant NAGW 2166.
Djorgovski Stanislav
Laidler Victoria G.
Lasker Barry M.
Postman Marc
Reid Iain Neill
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