Astrometric Calibration of the Sloan Digital Sky Survey

作者: Robert H. Lupton , Željko Ivezić , Robert B. Hindsley , Stephen M. Kent , Jeffrey R. Pier

DOI: 10.1086/346138

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摘要: The astrometric calibration of the Sloan Digital Sky Survey is described. For point sources brighter than r ~ 20, accuracy 45 mas rms per coordinate when reduced against USNO CCD Astrograph Catalog and 75 Tycho-2, with an additional 20–30 systematic error in both cases. errors are dominated by anomalous refraction random primary reference catalogs. relative between filter each other filters (u, g, i, z) 25–35 rms. At survey limit (r 22), limited photon statistics to approximately 100 for typical seeing. Anomalous shown contain components correlated over 2° or more on sky.

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