GCN Circular 38188
Subject
GRB 241112B: AbAO optical upper limit
Date
2024-11-13T03:21:14Z (2 months ago)
From
Alexei Pozanenko at IKI, Moscow <grb.alex@gmail.com>
Via
legacy email
N. Pankov (HSE, IKI), A. Pozanenko (IKI), R. Ya. Inasaridze (AbAO) report
on behalf of IKI-GRB-FuN:
We observed the field of GRB 241112B (SVOM/ECLAIRs Commissioning Team &
SVOM JSWG, GCN 38173; Evans, GCN 38174; Kumar et. al, GCN 38175; Du et. al,
GCN 38176; SVOM/VT commissioning team & SVOM JSWG, GCN 38179; SVOM/GRM team
& SVOM JSWG, GCN 38180; Turpin et. al, GCN 38181) with 70-cm AS-32
telescope of Abastumani observatory (AbAO). The observations began on
2024-11-12 at 15:03:45 UT. In total, the series of 101x60 s frames was
taken in the R-filter using CCD-photometer FLI PL4240. We do not detect the
optical afterglow (SVOM/VT commissioning team & SVOM JSWG, GCN 38179;
Turpin et. al, GCN 38181).
The preliminary photometry is as follows:
Date UTstart Exptime t-T0 Filter OT Err UL
(s) (mid, days) (3sigma)
2024-11-12 15:03:45 98*60 0.205139 R n/d n/d 19.6
The magnitudes were calibrated using nearby stars of USNO-B1.0 (R2
magnitudes).
RA Dec R2
01:56:20.7 +09:09:01.4 14.86
01:56:40.2 +09:10:09.0 15.24