GCN Circular 18090
Subject
GRB 150728A: FTN observations
Date
2015-07-28T17:07:38Z (9 years ago)
From
Simone Dichiara at Ferrara U/Italy <dichiara@fe.infn.it>
S. Dichiara, C. Guidorzi (U. Ferrara), C.G. Mundell (U. Bath),
S. Kobayashi (LJMU), A. Gomboc (U. Ljubljana) on behalf of
a large collaboration report:
The 2-m Faulkes Telescope North began observing Swift GRB 150728A
(Krimm et al. GCN 18087) on July 28, 13:48:25 UT (~57 minutes after
the BAT trigger) with SDSS r and i filters.
we identify an uncatalogued object within XRT error circle
(Beardmore et al. GCN 18088), at the following position:
RA(J2000) = 19:28:54.81
Dec(J2000)= +33:54:58.0
with an uncertainty of 1". The counterpart has the following
magnitudes:
Mid time from Total Exp Filter Magnitude
trigger (min) (s)
-------------------------------------------------
61.8 120x5 r' 21.8 +- 0.3
73.3 120x5 i' 20.7 +- 0.3
-------------------------------------------------
Magnitudes are calibrated against nearby USNOB-1 stars
(R2 and I).
Presently we cannot state anything about possible variability in
the source flux. However, we note that field is quite crowded.