Selected Light Curves of Optically Variable Stars Detected with the Chandra Aspect Camera

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Scientific paper

A wide variety of variable stars has been observed with the Aspect Camera Assembly (ACA), used for pointing control by the Chandra X-ray Observatory. The signal-to-noise ratios for the optical data from the ACA allow detection of variations greater than 0.01 mag. Chandra observations range from a few to a few hundred thousand ksec, providing opportunities to identify variables with periods from hours to days. We show examples of several types of pulsating variables, and eclipsing and contact binaries, some previously known and others unknown. This work was supported by NASA contract NAS8-39073.

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