GCN Circular 44054
Subject
The EP-WXT trigger 01709258989 is likely a flaring star
Date
2026-03-20T03:33:53Z (25 days ago)
From
EP Team at NAOC/CAS <ep_ta@bao.ac.cn>
Via
Web form
H. Zhou, Y. Wang, Q. J. Huang (PMO, CAS), J. P. Chen (SYSU), H. Sun (NAO, CAS) on behalf of the Einstein Probe (EP) team:
The EP-WXT trigger 01709258989 at the time of 2026-03-20T02:33:39 UTC, EP-FXT performed an automatic follow-up observation, and detected a source at RA: 112.7520 deg, Dec: 46.0075 deg, is likely a stellar flare associated with 1RXS J073101.9+460030. The estimated flux of the flare is around 1.0 x 10^(-10) erg/s/cm^2 in 0.5-4.0 keV, corresponding to an X-ray luminosity of around 3.6 x 10^31 erg/s.
Launched on January 9, 2024, EP is a space X-ray observatory to monitor the soft X-ray sky with X-ray follow-up capability (Yuan et al. 2022, Handbook of X-ray and Gamma-ray Astrophysics).