2022
DOI: 10.1088/1674-4527/aca190
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X-Ray and Ultraviolet Flares on AT Microscopii Observed by AstroSat

Abstract: We present observations of the active M-dwarf binary AT Mic (dM4.5e+dM4.5e) obtained with the orbital observatory AstroSat. During 20 ks of observations, in the far ultraviolet (130-180 nm) and soft X-ray (0.3-7 keV) spectral ranges, we detected both quiescent emission and at least five flares on different components of the binary. The X-ray flares were typically longer than and delayed (by 5-6 min) with respect to their ultraviolet counterparts, in agreement with the Neupert effect. Using X-ray spectral fits,… Show more

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