GCN Circular 37953
Subject
GRB 241026A: SAO RAS optical observations
Event
Date
2024-10-30T02:07:18Z (a year ago)
From
Moskvitin Alexander at SAO RAS <mosk@sao.ru>
Via
legacy email
A. S. Moskvitin and O. I. Spiridonova (SAO RAS), report
on behalf of the GRB follow-up team.
We observed the field of GRB 241026A (The Fermi GBM team, GCN 37894;
Melandri et al., GCN 37896, Li et al., GCN 37909; Zhang et al.,
GCN 37921; Zhang, Xiong and Wang GCN 37924; Pal et al., GCN 37929)
with the 1-m telescope of SAO RAS, Zeiss-1000/CCD-photometer
in Rc band on October 28/29 and 29/30 nights.
The OT (Moskvitin et al., GCNs 37899, 37916; Watson et al., GCN 37900;
Zheng & Filippenko GCN 37903; Shrestha et al., GCN 37913; Mo et al.,
GCN 37915; Mohan et al., GCN 37918; Izzo et al., GCN 37925;
Wang et al., GCN 37928) is not detected in the October 28/29 data,
but marginally detected in the October 29 stacked frame.
Preliminary results are as follows.
date UT_start--UT_end t_mid-T0 exp, s R magnitude R_lim
28/29 21:30:53--01:10:41 2.02657 500 n/d 21.6
29 17:42:02--18:36:46 2.81034 2490 22.95 +/- 0.24 23.3
The frames were calibrated against nearby USNO-B1 stars
(R2 magnitudes) and not corrected for MW extinction.