GCN Circular 28886

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
Not found
 
 
 (Coughlin et 
al., GCN  28841
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)  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
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; Xu  et al., GCN 28846
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; Zhu et al., GCN 28854
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; Mao et 
al., GCN  28861
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; Belkin et al., GCNs 28862
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, 28875
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, 28883
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;  Mao et al., 
GCN 28863
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; Kumar et al., GCN 28876
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; SungHak  et al., GCN 28880
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) at 
redshift  z = 1.105 (Xu et al., GCN 28847
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) associated with afterglow of 
GRB 201103B (Ursi et al., GCN 28831
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; Svinkin et al., GCN 28844
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; Evans et 
al., GCN 28858
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).

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
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, 28875
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, 28883
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.