GCN Circular 18275
Subject
GRB 150910A: SAO RAS optical photometry
Event
Date
2015-09-11T02:06:57Z (10 years ago)
From
Moskvitin Alexander at SAO RAS <mosk@sao.ru>
A.S.Moskvitin (SAO RAS), V.P.Goranskij (SAI, Moscow State University),
report on behalf of larger GRB follow-up team:
We observed the field of the GRB 150910A (Pagani et al., GCN #18264)
with the Zeiss-1000, 1-meter telescope of SAO RAS (Russia),
equipped with the broadband filters UBVRcIc and EEV 42-40 CCD.
The observations started since 10.85 hours after the trigger.
We obtained sets of 6 x 300-sec. frames in Rc band three times per
September, 10/11 night. The OT (reported by Pagani et al., GCN #18264;
Zheng & Filippenko, GCN #18265; Dichiara et al., GCN #18266;
Kuroda et al., GCN #18267; Xu et al., GCN #18269; McCauley & Pagani,
GCN #18270; Zheng et al., GCN #18273; de Ugarte Postigo et al.,
GCN #18274) is clearly visible even in single frames.
The results of observations are as following.
# (T_mid-T0),h exp.,s R_mag time, UT
1. 11.035 6 x 300 20.20 +/- 0.05 19:56:03--20:17:48
2. 13.448 6 x 300 20.57 +/- 0.05 22:15:17--22:48:09
3. 15.739 6 x 300 20.78 +/- 0.05 00:32:30--01:05:46
Photometry is based on nearby SDSS stars (their magnitudes
were converted with the Lupon 2005 equations).