[vsnet-grb-info 26780] ZTF20acozryr/AT2020yxz (GRB 201103B): Mondy continued optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  28883
SUBJECT: ZTF20acozryr/AT2020yxz (GRB 201103B): Mondy continued optical observations
DATE:    20/11/12 11:36:35 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

S. Belkin (IKI), N. Pankov (HSE), A. Pozanenko (IKI),  E. Klunko (ISTP), 
report on behalf of GRB IKI FuN:

We continued observations of the ZTF20acozryr/AT2020yxz (Coughlin et 
al., GCN  28841) with AZT-33IK telescope of Mondy observatory.  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;  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)


2020-11-09 14:53:25 5.88657    R     30*120  21.67 0.19  22.5 AZT-33IK
2020-11-11 13:59:54 7.84871    R     29*120  21.60 0.25  21.8 AZT-33IK


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