Han-Tang Lin, Wen-Ping Chen (Graduate Institute of Astronomy, National Central University); Jinzhong Liu (Xinjing Astronomical Observatory)
We present detection of stellar flares of Wolf 359, an M5.5 dwarf in the solar neighborhood (2.42~pc) known to have active surface magnetic activity. The observations were carried out in 2020 April 23 to 29 by the 1 m telescope (NOWT) at Nanshan of XAO, and with one of the 0.5-m TAOS/BEST telescopes located in Qitai. During effectively about 25 hours of monitoring, a total of 10 optical flares were detected, including a "superflare" occurred on April 26 and was observed by both telescopes, enabling us to check the systematics (different cadences, filters) and any possible details in the flare light curves. The flare frequency by our analysis is consistent with that reported previously in radio, X-ray and optical wavelengths. We discuss the flare parameters of Wolf 359 such as the released energy, time duration in the contexts of active M dwarfs prone to stellar flares.