Statistical study of stellar flares observed with TESS

We present a statistical study of stellar flares based on TESS observations. We used the two-minute cadence data obtained from sectors 1 - 37. Our software allows us to identify flares and determine its parameters such as: amplitude, duration, growth and decay times.  Furthermore, we estimate the maximum luminosity and total energy of flares in two different methods. We investigate distributions of flare frequencies and its dependence upon spectral types. In the first two years of TESS observations, we already identified about 130 000 flares from more than 23 000 flaring stars from F-type to M-type. From the analysis we conclude that approximately 7.5 percent of all observed stars show flaring activity, which is in agreement with other papers on this topic. Based on bolometric flare energy estimations, we conclude that its energies range from 10^31 to 10^37 erg, with an average energy of 10^34 erg. The result of the performed analysis is also the statistical distribution of the parameters of flaring stars.