GCN Circular 33559
Subject
GRB 230328B: Multa observatory optical afterglow observation
Date
2023-04-03T23:51:33Z (a year ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
N. Pankov (HSE), L. Elenin (KIAM RAS), A. Krylov (KIAM RAS), A.
Pozanenko (IKI), S. Belkin (IKI) report on behalf of GRB IKI FuN:
We observed the field of GRB 230328B (Gropp et al. GCN 33527; Veres et
al., GCN 33526; Dalessi et al., GCN 33531; Waratkar et al., GCN 33532;
Dafcikova et al., GCN 33543; Svinkin et al. GCN 33544) with
Santel-400 (0.4m) telescope of ISON-Multa observatory (Altay Republic)
in Clear filter on 2023-03-28 starting on (UT) 15:16:06. We detect the
optical afterglow of GRB 230328B (Gropp et al. GCN 33527; Pankov et al.
GCN 33528; Belkin et al. GCN 33530; Lu et al. GCN 33534; Catapano et al.
GCN 33535; Suresh et al. GCN 33536; Adami et al. GCN 33537; Gompertz
et al. GCN 33538; Komesh et al. GCN 33539; Lu et al. GCN 33540; Ror et
al. GCN 33547; Kugel et al. GCN 33550; Siegel et al. GCN 33556).
Preliminary photometry of the afterglow source is following
Date UT start t-T0 Exp. Filter OT Err. UL(3sigma)
(mid, days) (s)
2023-03-28 15:16:06 0.04603 90*60 Clear 18.9 0.1 20.0
The photometry is based on nearby USNO-B1.0 (R2) stars.