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TOI-1338: TESS’ First Transiting Circumbinary Planet

  • Authors: Veselin B. Kostov, Jerome A. Orosz, Adina D. Feinstein, William F. Welsh, Wolf Cukier, Nader Haghighipour, Billy Quarles, David V. Martin, Benjamin T. Montet, Guillermo Torres, Amaury H.M.J. Triaud, Thomas Barclay, Patricia Boyd, Cesar Briceno, Andrew Collier Cameron, Alexandre C.M. Correia, Emily A. Gilbert, Samuel Gill, Michaël Gillon, Jacob Haqq-Misra, Coel Hellier, Courtney Dressing, Daniel C. Fabrycky, Gabor Furesz, Jon Jenkins, Stephen R. Kane, Ravi Kopparapu, Vedad Kunovac Hodžić, David W. Latham, Nicholas Law, Alan M. Levine, Gongjie Li, Chris Lintott, Jack J. Lissauer, Andrew W. Mann, Tsevi Mazeh, Rosemary Mardling, Pierre F.L. Maxted, Nora Eisner, Francesco Pepe, Joshua Pepper, Don Pollacco, Samuel N. Quinn, Elisa V. Quintana, Jason F. Rowe, George Ricker, Mark E. Rose, S. Seager, Alexandre Santerne, Damien Ségransan, Donald R. Short, Jeffrey C. Smith, Matthew R. Standing, Andrei Tokovinin, Trifon Trifonov, Oliver Turner, Joseph D. Twicken, Stéphane Udry, Roland Vanderspek, Joshua N. Winn, Eric T. Wolf, Carl Ziegler, Peter Ansorge, Frank Barnet, Joel Bergeron, Marc Huten, Giuseppe Pappa, and Timo van der Straeten

2020 The Astronomical Journal 159 253.

  • Provider: AAS Journals

Caption: Figure 3.

Aperture photometry for Sector 3 data (upper curve) with the flux model predicted from changes in the shape of the PSF at each cadence inferred by eleanor PSF modeling (lower curve). We expect that spurious events caused by changes in the PSF to appear in both curves, whereas astrophysical events, which occur independently of the instrumental PSF, will only appear in the upper curve. Thus, the apparent events near days 1390, 1403, and 1404 are caused by changes in the PSF shape that occur as parts of the star fall off and on the detector owing to pointing jitter. The purple- and green-shaded regions correspond to the locations of secondary eclipses and a transit of the planet, respectively. These events are apparent only in the upper curve, which is a strong indication of their validity. Finally, we note that the deep feature near day 1395 is a primary eclipse.

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