[vsnet-grb-info 17028] GRB 150911A: Chuguev observatory upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  18309
SUBJECT: GRB 150911A: Chuguev observatory upper limit
DATE:    15/09/14 08:47:21 GMT
FROM:    Alexei Pozanenko at IKI  <alex at grb.rssi.ru>

Yu. Krugly (IA KhNU), V. Shevchenko (IA KhNU), T. Gromakina (IA KhNU), I. Molotov (KIAM), E. Mazaeva (IKI), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:

We observed the field of GRB 150911A (Starling et al., GCN 18280) with 0.7m telescope of Institute of Astronomy, Kharkiv National University starting on Sep. 12 (UT) 01:07:23. We do not detect any object within enhanced XRT error circle (Goad et al., GCN 18283). Photometry of the field is following


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

2015-09-12 01:07:23 0.2804 R      11*180 20.8

Photometry is based on nearby USNO-B.1 stars
USNO-B.1_id R2
0957-0043966 15.54
0957-0043954 16.24
0957-0043961 16.45