SNAD catalogue of M-dwarf flares from the Zwicky Transient Facility
A. S. Voloshina, A. D. Lavrukhina, M. V. Pruzhinskaya, K. L., Malanchev, E. E. O. Ishida, V. V. Krushinsky, P. D. Aleo, E. Gangler, M. V., Kornilov, V. S. Korolev, E. Russeil, T. A. Semenikhin, S. Sreejith, A. A., Volnova (The SNAD team)

TL;DR
This paper introduces new methods to detect M-dwarf stellar flares in ground-based surveys, resulting in the largest ZTF flare catalog with detailed analysis of their properties and energies.
Contribution
It presents novel algorithms combining parametric fitting and machine learning for flare detection in ZTF data, significantly expanding the known sample of M-dwarf flares.
Findings
Identified 134 flares from over 35 million light curves.
Created the largest catalog of ZTF flaring stars to date.
Estimated bolometric energies for select flares with Gaia distances.
Abstract
Most of the stars in the Universe are M spectral class dwarfs, which are known to be the source of bright and frequent stellar flares. In this paper, we propose new approaches to discover M-dwarf flares in ground-based photometric surveys. We employ two approaches: a modification of a traditional method of parametric fit search and a machine learning algorithm based on active anomaly detection. The algorithms are applied to Zwicky Transient Facility (ZTF) data release 8, which includes the data from the ZTF high-cadence survey, allowing us to reveal flares lasting from minutes to hours. We analyze over 35 million ZTF light curves and visually scrutinize 1168 candidates suggested by the algorithms to filter out artifacts, occultations of a star by an asteroid, and other types of known variable objects. The result of this analysis is the largest catalogue of ZTF flaring stars to date,…
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Taxonomy
TopicsGamma-ray bursts and supernovae · Stellar, planetary, and galactic studies · Astronomy and Astrophysical Research
