Other
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.6201d&link_type=abstract
American Astronomical Society Meeting 210, #62.01; Bulletin of the American Astronomical Society, Vol. 39, p.170
Other
Scientific paper
The Palomar-Quest (PQ) survey is a collaborative venture between groups at Caltech and Yale university, with smaller collaborations on specific subjects involving several other groups. The survey uses a 112-CCD, 161-Megapixel camera mounted on the Palomar Samuel Oschin 48-inch Schmidt telescope, and uses approximately 45% of the observing time. The sky is covered in drift scan strips 4.6deg wide in Dec, in the range -25deg to +25deg, typically covering about 500deg2 per night, for a total survey area of about 15500deg2 of the sky. The scans are done with 4 filters quasi-simultaneously, either the standard UBRI, or the SDSS griz, roughly in equal proportion. In a single pass in good conditions, the typical limiting magnitudes are about 21 - 21.5 mag, and in about 8 coadded passes we reach the depth of SDSS in the redder bands. A major feature of the survey is its synoptic nature - repeated scans with the cadence spanning time baselines from days to years (and decades, when matched to the previous sky surveys). The data rate is up to 1 TB/month, and there are about 20 TB of drift scan data now in hand; the first public data release is expected shortly. The survey (including data access and distribution) is designed and implemented entirely within the Virtual Observatory framework. Several separate data reduction pipelines, each optimized for different kinds of science, are now operating or are being developed. The survey enables a broad range of science, including searches for distant quasars, gravitational lenses, etc. The principal scientific focus now is exploration of the time domain, including searches for SNe, variable stars, and other known and astrophysically useful phenomena, as well as the the as-yet unknown or poorly understood ones.
Baltay Charles
Bauer Amanda
Djorgovski George
Donalek Ciro
Drake Adam
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