The Guide Star Photometric Catalog.

Physics

Scientific paper

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Astronomical Catalogs, Stellar Physics, Stellar Spectrophotometry, Data Processing, Hubble Space Telescope, Stellar Magnitude, Tables (Data)

Scientific paper

This paper presents data and finding charts for the Guide Star Photometric Catalog (GSPC), which is an all-sky set of 1477 pohotoelectrically determined BV sequences covering the magnitude range from 9 to 15. The GSPC was created to provide photometric calibrators for the Guide Star Catalog, which is a catalog of approximately 2 x 10 to the 7th objects needed to support the pointing of the Hubble Space Telescope. For declinations greater than +3 deg, the sequences generally lie near the centers of the original (Palomar Observatory-National Geographic Society) Sky Atlas, while for smaller declinations they lie near the centers for the ESO/SERC Southern Sky Atlas. The sequences nominally contain (at least) six stars, each with a photometric precision of 0.05 mag. In practice, a small number of sequences contains fewer stars, and the precisions achieved for the faintest stars are more nearly 0.1 mag.

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