GCN Circular 38746
Subject
GRB 241229B: Continued CrAO ZTSh observations
Date
2024-12-31T23:03:47Z (9 days ago)
From
Alexei Pozanenko at IKI, Moscow <grb.alex@gmail.com>
Via
email
N. Pankov (HSE, IKI), A. Volnova (IKI), A. Pozanenko (IKI), V. Rumyantsev
(CrAO), report on behalf of the IKI-GRB-FuN collaboration:
We observed the field of GRB 241229B (Fermi GBM Team, GCN 38698; D'Ai et
al., GCN 38699) with 2.6-meter ZTSh telescope of CrAO. The observations
started on 2024-12-30 (UT) 18:30, i.e. ~1.73 days since GBM trigger. The
series of 30x120 s images were obtained using the CCD-photometer. The
optical counterpart (SVOM/VT team, GCN 38729; Volnova et. al, GCN 38732)
has been detected in a stacked image. Preliminary photometry is the
following:
Date UTstart T-T0 Exp. Filter OT Err. UL(3sigma)
(mid, days) (s)
2024-12-30 18:13:33 1.73423 30x120 R 23.40 0.15 24.0
The photometry has been calibrated against nearby PS1 stars (see Volnova
et. al, GCN 38732).