Title: Follow-up of Candidate Transiting Planets Discovered by Citizen Scientists in TESS Data PI: Tabetha Boyajian Abstract ----------------------------------------------------------------------------------- We propose to use the CHIRON echelle spectrograph on the 1.5m CTIO SMARTS telescope to continue to follow-up transiting planet candidates identified by citizen scientists in TESS data, as part of the Zooniverse Planet Hunters TESS project (planethunters.org). Our sample consists of single-transit events and/or transits around unusual (variable or binary) stars, which were not iden- tified by the TESS pipeline or any other standard transit search algorithm, orbiting bright (V<10) stars. We will use reconnaissance spectroscopy to derive stellar parameters, identify spectroscopic binaries, and place limits on the companion masses. The SMARTS observations will play a key role in identifying the best candidates for subsequent high-precision RV follow-up to measure com- panion masses. Our candidates will add substantially to the sample of small, long-period (P>30 d) and/or young transiting planets with measured masses.