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ABSTRACT We present a study of the detection efficiency for the TESS mission, focusing on the yield of longer period transiting exoplanets (P 25 d). We created the Transit Investigation and Recoverability Application (TIaRA) pipeline to use real TESS data with injected transits to create sensitivity maps which we combine with occurrence rates derived from Kepler. This allows us to predict longer period exoplanet yields, which will help design follow-up photometric and spectroscopic programs, such as the NGTS (Next Generation Transit Survey) Monotransit Program. For the TESS Years 1 and 3 SPOC (Science Processing Operations Centre) FFI (Full Frame Image) light curves, we find 2271^+241-₁₃₈ exoplanets should be detectable around AFGKM dwarf host stars. We find 215^+37-₂₃ exoplanets should be detected from single-transit events or ‘monotransits’. An additional 113^+22-₁₃ detections should result from ‘biennial duotransit’ events with one transit in Year 1 and a second in Year 3. We also find that K dwarf stars yield the most detections by TESS per star observed. When comparing our results to the TOI (TESS objects of interest) catalogue, we find our predictions agree within 1σ of the number of discovered systems with periods between 0. 78 and 6. 25 d and agree to 2σ for periods between 6. 25 and 25 d. Beyond periods of 25 d, we predict 403^+64-₃₈ detections, which is three times as many detections as there are in the TOI catalogue with 3σ confidence. This indicates a significant number of long-period planets yet to be discovered from TESS data as monotransits or biennial duotransits.
Rodel et al. (Mon,) studied this question.