TITLE: GCN CIRCULAR NUMBER: 38669 SUBJECT: GRB 241029A: AbAO AS-32 optical observations DATE: 24/12/25 07:22:16 GMT FROM: Nicolai Pankov at HSE, IKI RAS colinsergesen@gmail.com
N. Pankov (HSE, IKI), R. Ya. Inasaridze (AbAO), A. Pozanenko (IKI) report on behalf of IKI-GRB-FuN:
We performed optical observations of the field of GRB 241029A (The Fermi GBM team, GCN 37932; Schanne et. al, GCN 37934; Wang et. al, GCN 37935; Evans, GCN 37936; Jiang et. al, GCN 37937; Lin et. al, GCN 37939; Jiang et. al, GCN 37940; C.Francile et. al, GCN 37941; Ackley et. al, GCN 37943; Odeh et. al, GCN 37944; Myers et. al, GCN 37945; Bernardini et. al, GCN 37946; Adami et. al, GCN 37948; Fernandez et. al, GCN 37950; Moskvitin et. al, GCN 37954; Saikia et. al, GCN 37961; Qiu et. al, GCN 37994; Izzo, GCN 38006; Watson et. al, GCN 38009; Dafcikova et. al, GCN 38048) in the R filter with AS-32 of Abastumani observatory (AbAO) equipped with CCD-photometer FLI PL4240. The observations began on 2024-10-29 15:10 UT, i.e. ~0.55 days since trigger. The optical counterpart is marginally detected in the stacked image of 43*60 sec. The preliminary photometry is given below:
Date UT start t-T0 Exp. Filter OT Err. UL(3sigma) (mid, days) (s) 2024-10-29 15:10:45 0.550185 43*60 R 20.9 0.3 20.9
The magnitudes were calibrated using nearby stars from USNO-B1.0 (R2 magnitudes) and are not corrected for the Galactic extinction.
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