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GCN Circular 18307

Subject

GRB 150911A: Khureltogot upper limit

Date

2015-09-14T07:20:31Z (9 years ago)

From

Alexei Pozanenko at IKI <alex@grb.rssi.ru>

E. Mazaeva (IKI), S. Schmalz (AIP), N. Tungalag (Research Center of Astronomy and Geophysics MAS), A. Volnova (IKI), I.Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:

We observed the field of GRB 150911A (Starling et al., GCN 18280Not found
 
 
) with ORI-40 telescope of Khureltogot observatory starting on Sep., 11 (UT) 19:03:00, i.e. ~23 minutes after the burst trigger. We do not detect any object within enhanced XRT error circle (Goad et al., GCN 18283Not found
 
 
). Photometry of the field is following


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

2015-09-11 19:03:00 0.0351 none   45*60 20.9

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