GCN Circular 17692
Subject
GRB 150413A: Khureltogot optical observations
Date
2015-04-13T15:55:04Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Schmalz (AIP), A. Pozanenko (IKI), N. Tungalag (Research Center of
Astronomy and Geophysics MAS), E. Mazaeva (IKI), A. Volnova (IKI),
I.Molotov (KIAM), A. Pozanenko (IKI) report on behalf of larger GRB
follow-up collaboration:
We observed the field of the GRB 150413A (Markwardt et al., GCN 17688;
Serino et al., GCN 17691) with ORI-40 telescope of Khureltogot
observatory starting on Apr., 13 (UT) 14:08:52, i.e. ~10 minutes after
burst trigger. Within BAT/Swift error circle we clearly detect
fading optical source (Ivanov et al. GCN 17689, Tyurina et al. GCN
17690). Preliminary photometry of the source in single images is following
Date UT start t-T0 Filter Exp. OT OT_err
(mid, days) (s)
2015-04-13 14:08:52 0.0069 none 60 14.7 0.1
2015-04-13 14:39:52 0.0318 none 60 15.6 0.1
2015-04-13 15:11:54 0.0541 none 60 16.3 0.1
Photometry is based on nearby USNO-B1.0 stars, R2 mags.
Observation is continuing.