TITLE:   GCN CIRCULAR
NUMBER:  30175
SUBJECT: GRB 210610B: CrAO/ZTSh optical observations
DATE:    21/06/10 20:50:39 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

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

We observed  the GRB 210610B (Page et al., GCN  30170)  with ZTSh 2.6m 
telescope of CrAO observatory starting on June., 10 (UT) 20:19:24.  We 
detect the bright optical afterglow (Page et al., GCN  30170). We 
continue observations and will report photometry after data receiving.