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Stellar sources of gamma rays are one of the front lines in modernastrophysics whose understanding can benefit from observational tools notoriginally designed for their study. We take advantage of the high precisionphotometric capabilities of present-day space facilities to obtain a newperspective on the optical behavior of the X-ray and gamma-ray binary LS I +61303. Previously unknown phenomena whose effects manifest with amplitudes below0.01 magnitude can now be clearly observed and studied. Our work is mainlybased on the analysis of optical and gamma-ray archival data and uses the toolsrecommended by the different collaborations that provide these valuableobservational resources (in particular, the TESS and Fermi orbitingobservatories). In addition, complementary ground-based optical spectroscopyhas also been conducted. We report the discovery of small-amplitude opticalflares on timescales of a day in the LS I +61 303 light curve. Differentalternative scenarios to explain their origin are tentatively proposed.

Optical microflares in LS I +61 303 and the search for their multiwavelength counterpart