Nice website on online citizen science project Planet Hunters, which I also participate in.
I’m Debra Fischer, a Professor of Astronomy at Yale University. Many of you have already discovered some amazing eclipsing binary light curves, and we wanted to provide you with some information. The Figures here show examples that you have put into collections. Some great additional examples are shown in a paper from the Kepler team (Prsá et al. 2010 http://arxiv.org/abs/1006.2815).
The Kepler light curves show how the brightness of the star changes with time. In Figure 1 (APH10135736 = KID 6449358) above, there are two stars orbiting each other. Similar to transiting planets, these stars cross in front of each other. The light curve shows the brightness level of the star, plotted vs time in days. Most of the time, both the larger, hotter star and the smaller cooler star yield a combined brightness measurement for the light curve. When the deep dip in brightness (the primary minimum) occurs…
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