,- Rheinisches Institut für Umweltforschung, Planetenforschung, Cologne, Germany (grziwas@uni-koeln.de)
Most confirmed planets known by date were detected in high resolution stellar light curves of the space missions CoRoT, Kepler, K2 and TESS. These light curves are searched for candidates by automatic detection pipelines because of the large data amount. Most detection methods make use of the periodicity of the transit in the light curve using Box leased square (BLS) algorithm or frequency analysis (e.g. FFT). These algorithms usually need three transits at least for a detection (light curves more than two times the length of the orbital period of the transit). Planets with only one transit visible in the light curve (single transits, mono transits) are usually not detected with these automatic pipelines. Single transits of binaries or large planets (Jupiter planets) are partially found by visual search or analysis of detections in multi-planet systems. Most of the planetary single transits of shallow depth (Neptune, Super-Earth planets) are still hidden in the archive data. Especially the relatively short light curves of K2 and TESS shall include many single transits of planets up to a period of 100 days not found yet.
In this SPP1992 project we developed a single transit detection pipeline using our existing wavelet based transient search algorithm SINGLETRANS. The available archive data of CoRoT, Kepler, K2 and TESS shall be searched for unknown single transits of especially small radius planets. Our pipeline will help to populate the area of planetary candidates with larger orbital periods. Detected single transits can be confirmed by ground-based follow-up (RV-measurements) or additional transit observation (e.g. CHEOPS). The additional number of detected candidates with larger orbital periods shall help to increase the diversity of exoplanets.
In the future early detections of single transits in light curves of the upcoming PLATO mission can help to priorities transit candidates and forecast the following transits.
Our tests show that SINGLETRANS is suitable to detect also periodic and ‘quasi periodic’ (strong TTV, circumbinary planets) transits.
How to cite: Grziwa, S., Schmerling, H., and Pätzold, M.: SINGLETRANS a new pipeline to detect mono transits in stellar light curves, EPSC-DPS Joint Meeting 2025, Helsinki, Finland, 7–12 Sep 2025, EPSC-DPS2025-1460, https://doi.org/10.5194/epsc-dps2025-1460, 2025.
