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GCN Circular 26899

GRB 200127A: AbAO optical upper limit
2020-01-27T18:59:15Z (4 years ago)
Alexei Pozanenko at IKI, Moscow <>
S. Belkin (IKI), A. Pozanenko (IKI), R. Ya. Inasaridze (AbAO ),  V. R. 
Ayvazian  (AbAO ), G.V. Kapanadze (AbAO), E. Mazaeva (IKI), A. Volnova 
(IKI), I. Molotov (KIAM) report on behalf of larger IKI GRB follow-up 

We observed  the GRB 200127A (Moss et al., GCN 26895) with AS-32 (0.7m) 
telescope of Abastumani Observatory starting on Jan. 27 (UT) 15:09:06. 
We obtained several 60 s exposures  in R-filter. We do not detect any 
source within  Swift-XRT position (Moss et al., GCN 26895).
Preliminary photometry of the field  is following

Date       UT start t-T0    Filter Exp.  OT    Err. UL(3sigma)
                    (mid, days)     (s)

2020-01-27 15:09:06 0.02922 R      35*60 n/d   n/d  20.4

Photometry is based on nearby USNO-B1.0 stars (R2 magnitude):

USNO-B1.0_id R2
1349-0340354 14.16
1349-0343444 15.86
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