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GCN Circular 22853

Subject
GRB 180626A: ISON-MN optical observations
Event
GRB 180626A
Date
2018-06-26T11:25:47Z (7 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
L. Elenin (KIAM), E. Mazaeva (IKI),  A. Pozanenko (IKI),  A. Volnova 
(IKI), I. Molotov (KIAM) report on behalf of larger GRB  follow-up 
collaboration:

We observed the field of  the Swift GRB 180626A  (Evans et al., GCN 
22850) with ISON-NM observatory. Observation started 51 s after burst 
trigger. We do not find optical afterglow (Evans et al., GCN  22850) in 
a combined image of first 5 frames. Preliminary photometry of the filed 
is following.


Date        UT start t-T0     Filter Exp.    OT   Err.   UL
                      (mid, days)     (s)

2018-06-26  08:22:07 0.00146  CR    5* 20  n/d  n/d    17.3

The photometry is based on several nearby USNO-B1.0 stars.
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