Jonah Goldfine (NYU) is looking, with Adrian Price-Whelan (Flatiron) and me, at short-period binary star systems in the NASA TESS data. We find that most of the short-period binaries that Price-Whelan finds in the APOGEE radial-velocity data have interesting variability in their photometry in the TESS data. Today we compared light curves folded on the Price-Whelan period found by The Joker with light curves folded on the period found with the Lomb-Scargle periodogram. There are lots of stars where The Joker gets the period better than the light curve, which is surprising, since we are validating with the light curve! There are so many kinds of variability to consider. Goldfine is going to start with ellipsoidal variations, I think.
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