The Perkins INfrared Exosatellite Survey (PINES). II. Transit Candidates and Implications for Planet Occurrence around L and T Dwarfs

Abstract We describe a new transit-detection algorithm designed to detect single-transit events in discontinuous Perkins INfrared Exosatellite Survey (PINES) observations of L and T dwarfs. use this search for transits 131 PINES light curves identify two transit candidates: 2MASS J18212815+1414010 (2MASS J1821+1414) J08350622+1953050 J0835+1953). disfavor J1821+1414 as genuine candidate due the known variability properties source. cannot rule out planetary nature J0835+1953's event perform follow-up an attempt recover second transit. A repeat has yet be observed, but these suggest that target is unlikely cause Markov Chain Monte Carlo simulation curve estimate planet radius ranging from 4.2 ? 1.6 + 3.5 R ? ${5.8}_{-2.1}^{+4.8}{R}_{\oplus 5.8 2.1 4.8 , depending on host’s age. Finally, we injection recovery our light-curve sample. inject planets into data using measured M-dwarf occurrence rates them transit-search algorithm. Our detection that, assuming rates, should have roughly 1% chance detecting could depth observe J0835+1953. If J0835+1953 b confirmed, it would enhancement short-period around dwarfs comparison M dwarfs, which challenge predictions formation models.