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  • Gibbs, Aidan; Bixel, Alex; Rackham, Benjamin; Apai, Daniel; Schlecker, Martin; Espinoza, Nestor; Mancini, Luigi; Wen-Ping, Chen; Henning, Thomas; Gabor, Paul; Boyle, Richard; Jose Perez Chavez; Mousseau, Allie; Dietrich, Jeremy; Socia, Quentin Jay; Ip, Wing; Chow-Choong Ngeow; Tsai, Anli; Bhandare, Asmita; Marian, Victor; Baehr, Hans; Brown, Samantha; Haberle, Maximilian; Keppler, Miriam; Molaverdikhani, Karan; Sarkis, Paula

    arXiv.org, 02/2020
    Paper, Journal Article

    Small planets are common around late-M dwarfs and can be detected through highly precise photometry by the transit method. Planets orbiting nearby stars are particularly important as they are often the best-suited for future follow-up studies. We present observations of three nearby M-dwarfs referred to as EIC-1, EIC-2, and EIC-3, and use them to search for transits and set limits on the presence of planets. On most nights our observations are sensitive to Earth-sized transiting planets, and photometric precision is similar to or better than TESS for faint late-M dwarfs of the same magnitude (I=15 mag). We present our photometry and transit search pipeline, which utilizes simple median detrending in combination with transit least squares based transit detection (Hippke & Heller 2019).For these targets, and transiting planets between one and two Earth radii, we achieve an average transit detection probability of 60% between periods of 0.5 and 2 days, 30% between 2 and 5 days,and 10% between 5 and 10 days. These sensitivities are conservative compared to visual searches.