TITLE:   GCN CIRCULAR
NUMBER:  38147
SUBJECT: EP241107a: AbAO optical upper limit
DATE:    24/11/09 22:30:15 GMT
FROM:    Alexei Pozanenko at IKI, Moscow <grb.alex@gmail.com>

 N. Pankov (HSE, IKI), R. Ya. Inasaridze (AbAO), A. Pozanenko (IKI) report
on behalf of GRB IKI FuN:

We observed the field  of EP241107a (Zhou et al., GCN 38112) with the AS-32
telescope of Abastumani observatory (AbAO) in R-filter starting on
2024-11-08 (UT) 16:34:02. We do not detect the optical afterglow (Odeh et
al., GCN 38115; SVOM/C-GFT team, GCN 38116; Lipunov et al., GCN 38117;
Mohan et al., GCN 38118; Busmann et al., GCN 38120; Adami et al., GCN
38122; Quirola-Vasquez et al., GCN 38126; Li et al., 38127; Odeh et al.,
GCN 38128; Kong et al., GCN 38131; Zheng et al., GCN 38136). Preliminary
photometry of the field  is following

Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)

2024-11-08 16:34:02 1.12545 R 74*60 n/d n/d 21.6

The photometry is based on nearby USNO-B1.0 stars.