NEMESIS: Exoplanet Transit Survey of Nearby M-dwarfs in TESS FFIS I

In this work, we present the analysis of 35,464 M-dwarf stars located within 100 parsecs in the Transiting Exoplanet Survey Satellite (TESS) Full Frame Images (FFIs) of the observed southern ecliptic hemisphere sectors 1 – 5. We present a new pipeline called NEMESIS which was developed to extract photometry, remove instrumental effects and perform transit searches of single sector data in TESS FFIs. As many M-dwarfs are faint and are not observed with a 2 minute cadence by TESS, FFI transit surveys can give an empirical validation of how many planets are missed by using the 30 minute cadence data. In this work, we detected 183 threshold crossing events and present 29 planet candidates for Sectors 1 – 5, 24 of which are new detections. Our sample contains orbital periods ranging from 1.25 – 6.84 days and planetary radii from 1.26 – 5.31 R⊕. We intend to extract light curves of other nearby M-dwarfs in TESS FFIs observed in Sectors 6 – 26 and will provide all of our data products for our planet candidates.