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GCN Circular 23497

Subject
GRB 181201A: continued optical observations in SAAO and Chilesope
Date
2018-12-03T17:38:47Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), E. Mazaeva (IKI), S. Belkin (IKI), D. Buckley (SAAO), 
M. Krugov (AFIF), A. Pozanenko (IKI)  report on behalf of IKI-FuN 
follow-up collaboration:

We continue multicolor observation  the   optical afterglow (e.g. 
Podesta et al., GCN  23470; Kong  GCN 23475)  of INTEGRAL GRB 181201A 
(Mereghetti et al., GCN  23469)  with 1m telescopes of SAAO (SAAO40in) 
and Chilescope (RC1000) observatories.    Preliminary photometry   is 
following

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

2018-12-02 19:09:26 1.69544 r'     2*600  18.69  0.02   SAAO40in
2018-12-02 19:30:07 1.70980 i'     2*600  18.54  0.07   SAAO40in
2018-12-02 19:50:44 1.72759 g'     3*600  19.07  0.05   SAAO40in
2018-12-03 01:32:26 1.95794 r'     600    18.92  0.04   RC1000

The photometry is based on the SDSS DR12 star

SDSS-DR12_id                 g        r        i
J211710.81-123706.3	     17.191   16.517   16.257
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