A Study of Flares in the Ultra-Cool Regime from SPECULOOS-South

Understand

We present a study of photometric flares on 154 low-mass ($\leq 0.2 \textrm{M}_{\odot}$) objects observed by the SPECULOOS-South Observatory from 1st June 2018 to 23rd March 2020.

• In this sample we identify 85 flaring objects, ranging in spectral type from M4 to L0.
• We detect 234 flares in this sample, with energies between $10^{29.2}$ and $10^{32.7}$ erg, using both automated and manual methods.
• With this work, we present the largest photometric sample of flares on late-M and ultra-cool dwarfs to date.