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GCN Circular 23423

Subject
GRB 181110A: optical observations in Chilescope observatory
Date
2018-11-11T18:27:48Z (6 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), E. Mazaeva (IKI), A. Volnova (IKI) 
  report on behalf of IKI-FuN follow-up collaboration:

We observed  the field of  GRB 181110A   (Evans et al., GCN 23413)  with 
RC-1000 telescopes of CHILESCOPE observatory. Observation started on 
Nov. 11 (UT) 01:02:08 in r'-filter and were performed under moderate 
seeing conditions of 1.5''.  We detect optical afterglow  (Evans et al., 
GCN 2341;  Yamanaka et al., GCN  23414; Murata et al., GCN  23415; 
Denisenko et al., GCN   23416; Perley et al., GCN  23421; Bolmer  et 
al., GCN   23422).

Preliminary photometry in AB is following.

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

2018-11-11 01:02:08 0.69979 r'     10*300 20.53 0.10 22.8

The photometry is based on several nearby stars, magnitudes taken from 
NOMAD catalog and Jester et al. (2005) transformations.
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