GCN Circular 29417
Subject
GRB 210204A (ZTF21aagwbjr/AT2021buv): Mondy and AbAO optical observations
Event
Date
2021-02-07T16:34:13Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), R. Ya. Inasaridze
(AbAO), N. Pankov (HSE) report on behalf of GRB IKI FuN:
We observed the ZTF21aagwbjr/AT2021buv transient (Kool et al., GCN
29405) at the redshift of 1.466 (Izzo et al., GCN 29411) which is most
probably is an afterglow (Kennea et al., GCN 29413; Teja et al., GCN
29414) of GRB 210204A (Fermi GBM team, GCN 29390; Li et al., GCN 29392;
Hurley et al., GCN 29408; Waratkar et al., GCN 29410; Frederiks et al.,
GCN 29415). Images in R-filter were taken in AZT-33IK telescope of Sayan
observatory (Mondy) and AS-32 telescope of Abastumani observatory (AbAO).
Preliminary photometry of the optical transient in a combined image is
following
Date UT start t-T0 Filter Exp. OT Err. UL(3s) Telescope
(mid, days) (s)
2021-02-06 12:33:10 2.26579 R 38*60 19.94 0.09 21.7 AZT-33IK
2021-02-06 16:50:17 2.44748 R 47*60 20.1 0.4 20.1 AS-32
The photometry is based on the nearby USNO-B1.0 stars.
USNO-B1.0_id R2
1014-0149033 15.43
1014-0149115 17.00