AAS 200th meeting, Albuquerque, NM, June 2002
Session 58. Source Surveys, Catalogs, Database Techniques
Display, Wednesday, June 5, 2002, 10:00am-7:00pm, SW Exhibit Hall

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[58.01] The Faint Sky Variability Survey - Who's Faint and Variable?

M. E. Huber (U. of Wyoming, PSI), S. B. Howell, M. E. Everett (PSI), P. J. Groot (U. of Nijmegen)

The Faint Sky Variability Survey is a large (23 sq. deg.), deep field (V=17-24 mags), optical (BVI), photometric (0.005-0.1 mags), and proper motion (30''/yr) survey using the Wide-Field Camera at the Isaac Newton Telescope on La Palma. Time-sampled observations span 10's of minutes to years and provide a unique database for studies of faint population classes (e.g. Kuiper Belt objects, cataclysmic variables, pulsating stars, very low-mass dwarfs, and AGN). Here we present a study of general variability as a function of the time-sampling (nightly, weekly, yearly), magnitude (V), and color (B-V, V-I) for more than 80,000 point sources detected. The fraction of variable sources overall is found to be approximately constant at a few percent for the majority of the magnitude range. The implications of our results, with comparison to other variability surveys, will be discussed.

MEH acknowledges support from by a NASA/Space Grant Fellowship, NASA Grant #NGT-40008.

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Bulletin of the American Astronomical Society, 34
© 2002. The American Astronomical Soceity.