[vsnet-grb-info 26783] ZTF20acozryr/AT2020yxz (GRB 201103B): CrAO/ZTSh optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  28886
SUBJECT: ZTF20acozryr/AT2020yxz (GRB 201103B): CrAO/ZTSh optical observations
DATE:    20/11/14 12:26:46 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

S. Belkin (IKI), A. Pozanenko (IKI), V. Rumyantsev (CrAO), N. Pankov 
(HSE) report on behalf of GRB IKI FuN:

We continued observations of the ZTF20acozryr/AT2020yxz (Coughlin et 
al., GCN  28841)  with ZTSh 2.6m telescope of CrAO observatory starting 
on Nov., 13 (UT) 22:58:04.  We detect the optical transient (Coughlin et 
al., GCN  28841; Xu  et al., GCN 28846; Zhu et al., GCN 28854; Mao et 
al., GCN  28861; Belkin et al., GCNs 28862, 28875, 28883;  Mao et al., 
GCN 28863; Kumar et al., GCN 28876; SungHak  et al., GCN 28880) at 
redshift  z = 1.105 (Xu et al., GCN 28847) associated with afterglow of 
GRB 201103B (Ursi et al., GCN 28831; Svinkin et al., GCN 28844; Evans et 
al., GCN 28858).

Preliminary photometry of the afterglow is following
Date       UT start  t-T0     Filter Exp.    OT    Err.   UL. Telescope
                      (mid, days)      (s)


2020-11-13 22:58:04 10.21897    R     24*120 21.67 0.16  22.1 ZTSh

The photometry is based on the same stars used in GCNs 28862, 28875, 28883.