GCN Circular 44394
Subject
EP-WXT trigger 01709260362: FRAM-ORM optical observations confirm flaring star G 151-9
Date
2026-04-22T18:53:47Z (11 hours ago)
From
Martin Jelinek at Astro.Inst-AVCR,Ondrejov <martin.jelinek@asu.cas.cz>
Via
email
Martin Jelinek, Jan Strobl and Filip Novotný (ASU CAS Ondrejov, CZ),
Sergey Karpov, Martin Masek, Petr Janecek, Jakub Jurysek, Jan Ebr,
Ronan Cunniffe, Petr Travnicek and Michael Prouza
(Institute of Physics, Prague, CZ)
report:
The 25cm robotic telescope FRAM-ORM at La Palma (Spain) reacted
robotically to the EP-WXT alert of trigger 01709260362 (Yang et al.,
GCN 44386), obtaining a series of 60 s unfiltered images starting at
21:24:16.6 UT on 2026-04-21, i.e. ~32.2 min post trigger
(T0 = 2026-04-21T20:52:02.749 UTC, JD 2461152.36948).
We clearly detect the flaring star G 151-9 identified by the EP team
(Yang et al., GCN 44386). The source fades by approximately 0.25 mag
over the course of our observations, which span from T0+32.2 min to
T0+2h 13.6 min. The overall decay is consistent with a power-law of index
alpha = 0.67 +/- 0.16, superimposed on the quiescent brightness of the
star at an unfiltered magnitude of 12.12 +/- 0.07. This is consistent
with the stellar flare interpretation.