Variability Studies with SDSS

Details Variability Studies with SDSS Variability Studies with SDSS

2003-01-20

arxiv.org/abs/astro-ph/0301400v1

Mem.Soc.Ast.It.74:978,2003

Astronomy and Astrophysics

Astrophysics

6 pages, 4 color figures, contribution for the workshop "Variability with Wide-field Imagers", Lampedusa, September 16-20, 200

Scientific paper

The potential of the Sloan Digital Sky Survey for wide-field variability studies is illustrated using multi-epoch observations for 3,000,000 point sources observed in 700 deg2 of sky, with time spans ranging from 3 hours to 3 years. These repeated observations of the same sources demonstrate that SDSS delivers ~0.02 mag photometry with well behaved and understood errors. We show that quasars dominate optically faint (r > 18) point sources that are variable on time scales longer than a few months, while for shorter time scales, and at bright magnitudes, most variable sources are stars.

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