GCN Circular 17366
Subject
GRB 150120B: Khureltogot optical observations
Event
Date
2015-01-30T21:25:11Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.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 150120B (D'Elia et al., GCN 17314) with
ORI-40 telescope of Khureltogot observatory on Jan., 20 starting on
(UT) 10:52:51. We obtained 90 unfiltered images of 60 s exposure.
Within enhanced Swift-XRT error circle (Goad et al., GCN 17320) we
clearly detect optical afterglow (Perley et al. GCN 17315, Guidorzi et
al. GCN 17316) in a combined image. Photometry of the afterglow is
following
Date UT start t-T0 Filter Exp. OT OT_err
(mid, days) (s)
2015-01-20 10:52:51 0.18068 none 90*60 20.75 0.20
The photometry is based on R magnitudes of nearby USNO-B1.0 stars
USNO-B1_id R2
0981-0032639 16.04
0981-0032644 17.10