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GCN Circular 46291

Subject
EP261114a is likely a flaring star
Event
EP261114a
Date
2026-11-15T10:50:42Z (5 hours ago)
From
EP Team at NAOC/CAS <ep_ta@bao.ac.cn>
Via
Web form

C. K. Kan (HKU), Y. Wang (PMO; UCB), Y. J. Yi (BNU), H. Sun (NAO, CAS) on behalf of the Einstein Probe (EP) team:

The EP-WXT detection of EP261114a (Kan et al., GCN 46284) is likely a stellar flare associated with the high proper motion star UCAC4 433-006766. The updated position from the FXT telemetry data analysis is R.A. = 68.3436 deg, DEC = -3.50425 deg (J2000) with an uncertainty of about 10 arcsec (radius, 90% C.L. statistical and systematic). The estimated flux of the flare is around 1.4 x 10^(-10) erg/s/cm^2 in 0.5-4.0 keV, corresponding to an X-ray luminosity of around 5.6 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).

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