TITLE:   GCN CIRCULAR
NUMBER:  31605
SUBJECT: ZTF22aaajecp/AT2022cmc: Zeiss-1000 of Koshka observatory continued optical observations
DATE:    22/02/18 19:54:06 GMT
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; 
GСN-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