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GCN Circular 19757

Subject
GRB 160801A: TSHAO optical observations
Date
2016-08-02T22:45:50Z (8 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Kusakin (Fesenkov Astrophysical Institute), I. Reva 
(Fesenkov Astrophysical Institute),  A. Pozanenko (IKI) report on behalf of 
larger GRB follow-up collaboration:

We observed the field of GRB 160801A  (D'Elia et al., GCN 19744 ) with 
Zeiss-1000 (East) 1-m telescope of Tien Shan Astronomical Observatory. We 
obtained several images in R filter starting on August 01 (UT) 15:10:55. We 
do not  detect any optical source within enhanced XRT error position (Goad 
et al., GCN 19746). Preliminary photometry of a combined image is following

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

2016-08-01 15:10:55  0.28422  R   60*120 n/d  n/d  22.4

Photometry is based on nearby SDSS DR9 stars
SDSS-DR9_id                   R(Lupton)
J141100.70+132838.3    17.993
J141057.03+132833.7    17.684
J141054.86+132751.0    18.338
J141055.05+132937.2    18.545
J141059.52+133105.4    19.518
J141102.35+133019.9    18.384
J141102.64+133004.5    18.354

Our preliminary  photometry of the SDSS object (Cano et al.,  GCN 19753) 
which is also mentioned by Moskvitin et al. (GCN 19755)  is R=21.1+/-0.1 and 
based on the same nearby SDSS stars.

A finding chart can be found  in 
http://grb.rssi.ru/GRB160801A/GRB160801A_TSHAO_160801_2.png
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