The largest M dwarfs flares from ASAS-SN
Sarah J. Schmidt, Benjamin J. Shappee, Jennifer L. van Saders, K. Z., Stanek, Jonathan S. Brown, C. S. Kochanek, Subo Dong, Maria R. Drout, Stephen, Frank, Thomas W.-S. Holoien, Sean Johnson, Barry F. Madore, Jose L. Prieto,, Mark Seibert, Marja K. Seidel, Gregory V. A. Simonian

TL;DR
This study analyzes 55 energetic flares on 49 M dwarf stars detected by ASAS-SN, revealing their energetic properties, magnetic activity, and likely thin disk membership, thus expanding understanding of stellar flare phenomena.
Contribution
The paper provides the first comprehensive follow-up and characterization of a large sample of M dwarf flares detected by ASAS-SN, including energy estimates and activity correlations.
Findings
55 flares on 49 M dwarfs with energies up to 10^35 ergs
Flares show high magnetic activity indicated by strong Hα emission
Flaring M dwarfs are likely members of the thin disk population
Abstract
The All-Sky Automated Survey for Supernovae (ASAS-SN) is the only project in existence to scan the entire sky in optical light every day, reaching a depth of mag. Over the course of its first four years of transient alerts (2013-2016), ASAS-SN observed 53 events classified as likely M dwarf flares. We present follow-up photometry and spectroscopy of all 53 candidates, confirming flare events on 47 M dwarfs, one K dwarf, and one L dwarf. The remaining four objects include a previously identified TT Tauri star, a young star with outbursts, and two objects too faint to confirm. A detailed examination of the 49 flare star light curves revealed an additional six flares on five stars, resulting in a total of 55 flares on 49 objects ranging in -band contrast from to mags. Using an empirical flare model to estimate the unobserved portions of the flare…
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