SN 2020jfo was a Type II supernova in the Messier 61 galaxy, first observed on 6 May 2020 with an apparent magnitude of 16.01. It was one of the first supernovae for which independent, multi-instrument data was collected before, during, and after the explosion. Large astronomical surveys like Transiting Exoplanet Survey Satellite (TESS) and Pan-STARRS have played a role in data collection before and after these events.
↑Ailawadhi, B.; Dastidar, R.; Misra, K.; Roy, R.; Hiramatsu, D.; Howell, D. A.; Brink, T. G.; Zheng, W.; Galbany, L.; Shahbandeh, M.; Arcavi, I.; Ashall, C.; Bostroem, K. A.; Burke, J.; Chapman, T.; Dimple; Filippenko, A. V.; Gangopadhyay, A.; Ghosh, A.; Hoffman, A. M.; Hosseinzadeh, G.; Jennings, C.; Jha, V. K.; Kumar, A.; Karamehmetoglu, E.; McCully, C.; McGinness, E.; Muller-Bravo, T. E.; Murakami, Y. S.; Pandey, S. B.; Pellegrino, C.; Piscarreta, L.; Rho, J.; Stritzinger, M.; Sunseri, J.; Van Dyk, S. D.; Yadav, L. (February 2023). "Photometric and spectroscopic analysis of the Type II SN 2020jfo with a short plateau". Monthly Notices of the Royal Astronomical Society. 519 (1): 248-270. arXiv:2211.02823. doi:10.1093/mnras/stac3234.