Raw XMM-Newton EPIC data, data reduction scripts for XMM-SAS, and reduced images and spectra extracted with XSPEC. The observations include the X-ray emission of TIC 277539431, a rapidly rotating M7 dwarf star that produced a polar flare in 2021, observed by the Transiting Exoplanet Survey Satellite (see Ilin et al. 2021). Publications based on this data set will be linked as they appear.

This dataset was made possible by the Deutsche Luft- und Raumfahrtgesellschaft (FKZ 50 OR 2209, project X-ray Loops). This work is based on observations obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA.