New Optically Variable Stars Detected with the Chandra Aspect Camera

Details New Optically Variable Stars Detected with the Chandra Aspect Camera New Optically Variable Stars Detected with the Chandra Aspect Camera

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.6003n&link_type=abstract

American Astronomical Society, AAS Meeting #211, #60.03; Bulletin of the American Astronomical Society, Vol. 39, p.843

Astronomy and Astrophysics

Astronomy

Scientific paper

Visual examination of the light curves of all guide stars used during the Chandra mission for purposes of telescope pointing accuracy has been completed. Over 400 stars have been identified as variable in the 4000-9000A range of the Chandra Aspect Camera used for tracking guide stars in visual wavelengths. Of these, more than 250 were not previously identified as variable. We present the database of Chandra Aspect Camera Variables with examples and preliminary variability types for some stars. The dataset includes, for example, a wide array of variability, including pulsation, contact and eclipsing binaries. The typically long exposures of the Chandra Observatory coupled with the photometric stability and sensitivity of the Chandra Aspect Camera make this new dataset unique. This work was supported by NASA contract NAS8-39073.

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