Astrometric Calibration Fields for the Sloan Digital Sky Survey (SDSS)

Details Astrometric Calibration Fields for the Sloan Digital Sky Survey (SDSS) Astrometric Calibration Fields for the Sloan Digital Sky Survey (SDSS)

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...187.7402s&link_type=abstract

American Astronomical Society, 187th AAS Meeting, #74.02; Bulletin of the American Astronomical Society, Vol. 27, p.1389

Astronomy and Astrophysics

Astronomy

Scientific paper

The Flagstaff Astrometric Scanning Transit Telescope (FASTT) is observing 16 regions spaced around the celestial equator that will be used to astrometrically calibrate the large CCD array in the Sloan 2.5m telescope during its survey (Gunn and Knapp 1993, ASP Conf. Series 43, p267). Each region is about 7.5(o) by 3.2(o) and includes many thousands of stars in the magnitude range V ~ 10 to 17. All regions are being observed repeatedly in scan mode with a Loral 2048(2) CCD with center-to-edge overlapping scans with the FASTT. The project is nearing completion, and the expected accuracy for the star positions is +/-50 mas, or better, in both coordinates and +/-0.03 mag in a passband similar to the Sloan r'-passband (lambda lambda 5600 - 7100 Angstroms). This paper describes the observations, reductions, and expected accuracies for the stars in these calibration regions.

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