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S.G. Djorgovski (CIT), R.R. Gal (JHU), R.R. de Carvalho (ON/CNPq), S.C. Odewahn (ASU), A.A. Mahabal, R. Brunner, P. Lopes (CIT), DPOSS Team
The Digital Palomar Observatory Sky Survey (DPOSS) is a digital version of the Second Palomar Observatory Sky Survey (POSS II), based on the plate scans done at STScI, CCD calibrations done at Palomar, and processing done at Caltech. DPOSS consists of the original image database (approx. 3 TB of pixels) and the derived catalogs and metadata, primarily the Palomar-Norris Sky Catalog (PNSC). DPOSS is a survey of the northern sky (Dec > -3 deg), in 3 bands (photographic JFN, calibrated to Gunn gri), reaching down to typical limiting magnitudes g ~21 - 21.5, r ~21, and i ~19.5 mag, with accurate star-galaxy classifications available for all objects down to ~1 - 1.5 mag above the detection limit. The survey and selected data products are now made publicly available through a web interface. The initial data release covers the high Galactic latitudes. The final catalog is expected to contain about 50 million galaxies and a billion stars. It is being matched (federated) with other major digital sky surveys, in an effort leading towards the National Virtual Observatory. We will describe the basic parameters of the survey (data quality, etc.), data availability, and some initial scientific applications.
Cataloging of DPOSS was supported in part by a generous gift from the Norris Foundation and other private donors. Software development work was supported in part by grants from NASA.
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