BV RI CCD photometry of 361,281 objects in the field of M 31

Astronomy and Astrophysics – Astronomy

Scientific paper

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Andromeda Galaxy, Astronomical Photometry, Charge Coupled Devices, Astronomical Catalogs, Color-Magnitude Diagram, Sky Surveys (Astronomy), Star Formation, Stellar Magnitude, X Ray Binaries

Scientific paper

Deep BV RI CCD photometry was performed on a 1 sq deg region of M 31. A catalog of photometry and astrometry of a total of 361,281 stars is presented, with typical completion limits of BV RI = (22.3, 22.2, 22.2, 20.9). Photometric accuracy is about 2 percent at V = 19. This catalog allows detailed studies of stellar populations and reddening. The data are currently being used to assist in finding the optical counterparts of Einstein and ROSAT X-ray sources.

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