GCN Circular 38925
Subject
EP250108a / AT 2025kg: SAO RAS optical observations
Date
2025-01-13T21:42:08Z (8 days ago)
From
Moskvitin Alexander at SAO RAS <mosk@sao.ru>
Via
Web form
A. S. Moskvitin and O. I. Spiridonova (SAO RAS),
report on behalf of the GRB follow-up team.
We observed the field of X-ray transient EP250108a detected by EP-WXT
(Li et al. GCN 38861) with the SAO RAS 1-m telescope Zeiss-1000
on January 11, 17:34:02--18:47:16 UT (t_mid - T0 = 3.2362 days).
We obtained 8 x 300 sec images in Rc band.
The OT (Eyles-Ferris, GCN 38878; Zhu et al., GCN 38885;
Malesani et al., GCN 38902; Kumar et al., GCN 38907; Zhu et al.,
GCN 38908, Levan et al., GCN 38909; Izzo, GCN 38912; Zou et al.,
GCN 38914) is marginally detected in our stacked image
with the brightness of R = 20.56 +/- 0.27 (calibrated anainst
nearby USNO-B1 stars and not corrected for the MW extinction).