GCN Circular 31625
Subject
ZTF22aaajecp/AT2022cmc: Terskol observatory optical observations
Event
Date
2022-02-21T20:28:05Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
Pankov (HSE), I. Sokolov (INASAN, KIAM), V. Kozlov (IC AMER), Y.
Markelov (KIAM), I. Izvekova (Institute of physics of NAS, IC AMER
NASU), Y. Markus (Institute of physics of NAS, IC AMER NASU), G.
Butenko (Institute of physics of NAS), A. Pozanenko (IKI), S. Belkin
(IKI, HSE) report on behalf of GRB IKI FuN:
We observed the optical transient of ZTF22aaajecp/AT2022cmc (Andreoni
et al., GCN 31590) with K-800 telescope, and Zeiss-600 telescope of
Terskol observatory on Feb. 15 and Feb. 17. We detected the optical
transient (Andreoni et al., GCN 31590; G��N-bibliography in Tanvir et
al., GCN 31602; see also Lipunov et al., GCN 31600) at the redshift of
z=1.193 (Tanvir et al., GCN 31602; Lundquist et al., GCN 31612) in
first epoch observation with K-800 in Clear filter. Preliminary
photometry of the transient and upper limit is following
Date UT start t-T0 Filter Exp. OT Err UL(3sigma) Telescope
2022-02-15 23:15:36 4.939271 C 93*30 20.15 0.2 20.9 K-800
2022-02-17 00:38:05 5.994641 C 88*30 n/d n/d 20.4 K-800
The photometry is based on the nearby SDSS-DR12 stars R (Lupton
transformations)
R.A. Dec R
203.7398307 33.1702037 17.794
203.7684775 33.1572431 17.347