GCN Circular 18281
Subject
GRB 150910A: TSHAO optical observations
Date
2015-09-11T19:27:21Z (9 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), I. Reva (Fesenkov Astrophysical Institute), A.
Kusakin (Fesenkov Astrophysical Institute), A. Volnova (IKI), A.
Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of GRB 150910A (Pagani et al., GCN 18264) with
Zeiss-1000 (East) 1-m telescope of Tien Shan Astronomical Observatory on
Sep. 10 (UT) 18:02:59 -- 20:37:38. We obtained several images in R and
B filters. In both filters the afterglow (Pagani et al., GCN 18264;
Zheng & Filippenko, GCN 18265) is clearly visible. Within 2.5 hours of
observations we do not detect significant fading of the afterglow. The
photometry of combined images are following
Date UT start t-T0 Filter Exp. OT Err
(mid, days) (s)
2015-09-10 18:08:20 0.42807 R 11*300 20.18 +/- 0.05
2015-09-10 18:02:59 0.42436 B 12*300 20.85 +/- 0.08
The photometry is based on nearby SDSS stars
SDSS_id R(Lupton)
J002232.47+332751.3 16.29
J002236.24+332854.2 15.92
J002241.61+332836.1 16.23
J002248.33+332723.4 16.76
J002231.90+333004.8 16.93
J002225.39+332809.6 16.12
J002246.76+332716.9 17.63
Our photometry in R-filter is in agreement with in subsequent
observations (Moskvitin & Goranskij, GCN 18275).