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Validation of TOI-1221 b: A Warm Sub-Neptune Exhibiting Transit Timing Variations around a Sun-like Star

  • Authors: Christopher Mann, David Lafreniére, Diana Dragomir, Samuel N. Quinn, Thiam-Guan Tan, Karen A. Collins, Steve B. Howell, Carl Ziegler, Andrew W. Mann, Keivan G. Stassun, Martti H. Kristiansen, Hugh Osborn, Tabetha Boyajian, Nora Eisner, Coel Hellier, George R. Ricker, Roland Vanderspek, David W. Latham, S. Seager, Joshua N. Winn, Jon M. Jenkins, Jesus Noel Villaseñor, Brian McLean, Pamela Rowden, Guillermo Torres, Douglas A. Caldwell, Kevin I. Collins, Richard P. Schwarz

Christopher Mann et al 2023 The Astronomical Journal 165 .

  • Provider: AAS Journals

Caption: Figure 3.

Light curves from the two LCOGT observations. Cyan points are binned to 15 minute intervals. The predicted timings come from the fixed-period ephemeris of previous TESS data. The transit duration is long enough to require observing from two separate longitudes to detect both ingress and egress. Like in Figure 1, the central orange and black lines indicate the midpoint timing expected by a fixed-period model or fitted by an agnostic model allowing TTVs, respectively.

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