AAS 204th Meeting, June 2004
Session 6 Stars: Winkin' and Blinkin'
Poster, Monday, May 31, 2004, 9:20am-6:30pm, Ballroom

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[6.04] HAT Variability Search in the High Stellar Density "Kepler Field" with Millimagnitude Image Subtraction Photometry

J.D. Hartman, G. Bakos, K.Z. Stanek, R.W. Noyes (Harvard-Smithsonian, CfA)

The Hungarian-made Automated Telescope network (HATnet) is an ongoing project to detect transiting extra-solar planets using small aperture, robotic telescopes. In this poster we present the results from using image subtraction photometry to reduce a crowded stellar field (chosen to coincide with the planned field of the Kepler mission). We obtained I-band lightcurves for 98,000 objects in a 67-square-degree Field of View centered at (295.92, 37.54), along the galactic plane in the constellations Lyra and Cygnus. These observations include 800 5-minute exposures spanning a 30 day period. For the brightest stars (I ~ 8.0) we achieved a precision of 3 millimagnitudes, falling to 0.04 magnitudes at the faint end (I ~ 14.5). From these lightcurves we identify several hundred variable stars, and we discuss some of the most interesting cases.

If you would like more information about this abstract, please follow the link to http://cfa-www.harvard.edu/~gbakos/HAT/index.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

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