GCN Circular 31605
Subject
ZTF22aaajecp/AT2022cmc: Zeiss-1000 of Koshka observatory continued optical observations
Date
2022-02-18T19:54:06Z (3 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
N. Pankov (HSE), A. Pozanenko (IKI), I. Nikolenko (IANSAN), S. Belkin
(IKI) report on behalf of GRB IKI FuN:
We observed the optical transient of ZTF22aaajecp/AT2022cmc (Andreoni
et al., GCN 31590) with Zeiss-1000 telescope of Koshka observatory
starting on Feb. 16 (UT) 20:52:267 in R- and I -filters. We do not
detect 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).
Preliminary photometry of the field is following
Date UT start MJD Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2022-02-16 20:52:26 59626.89683 R 78*60 n/d n/d 21.3
2022-02-16 20:54:47 59626.90575 I 99*60 n/d n/d 21.3
The photometry is based on the nearby SDSS-DR12 stars R(Lupton
transformations)
R.A. Dec R I
203.7398307 33.1702037 17.794 17.450
203.7684775 33.1572431 17.347 16.911