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GCN Circular 19771

Subject
GRB 160804A: SAO RAS optical observations
Date
2016-08-05T01:07:20Z (7 years ago)
From
Moskvitin Alexander at SAO RAS <mosk@sao.ru>
A. S. Moskvitin, T. A. Fatkhullin (SAO RAS, Russia) and I. Soloviev
(Saint-Petersburg Univ.), report on behalf of the larger team.

We observed the field of the GRB 160804A (Marshall et al., GCN 19761)
with the BTA, 6-meter telescope of SAO RAS, equipped with the
Scorpio-I at 2016.08.04 17:52 UT (16.3 hours after the detection).

A couple of Rc-band images (30 and 180 sec.) were obtained.
The GRB OT (Breeveld & Marshall, GCN 19764; Tyurina et al., GCN 19768)
is clearly detected in the stacked frame. The brightness of the object
is R = 20.5 +/- 0.1 (calibration was done by the nearby SDSS stars,
and Lupton 2005 transformation equations).

The finding chart can be found at
ftp://ftp.sao.ru/pub/grb/GRB160804A/GRB180804A_BTA.jpg
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