Sascha Grziwa, Martin Pätzold
The Rhenish Institute for Environmental Research, department of Planetary Research, at the University of Cologne (RIU-PF)
In the last years many new exoplanets were found by space-based missions like CoRoT, Kepler, TESS. Most of actual detected exoplanets have relative short orbital periods due to the relatively short observation baseline (e.g. mainly 30 days for TESS light curves).
A statistical comparison of the detected periodic transits in TESS light curves with the detected periodic transits in the longer KEPLER light curves reveals that TESS light curves should show many additional single transit events which are not detected so far. Single transits of Jupiter-size planets are regularly found while single transits of Neptune- or Earth-size planets are rarely detected. The detection of single transits can reveal long orbital period planet candidates attractive for follow-up observations, revisits or additional photometric observations (e.g. CHEOPS).
In this SPP Project we are developing the dedicated pipeline SINGLETRANS to search for single transit events of small planets in light curves. SINGLETRANS is a wavelet based transient search algorithm and shall complement our well-established detection pipeline EXOTRANS. SINGLETRANS shall also detect quasi-periodic transits (planets showing strong TTV, circumbinary planets). We will search the archival data from CoRoT, Kepler, K2 and TESS for single transits to find additional candidates with longer periods.