GCN Circular 15015
Subject
GRB 130722A: Faulkes Telescope South optical candidate
Date
2013-07-22T10:07:51Z (11 years ago)
From
Andrea Melandri at Liverpool John Moores U <axm@astro.livjm.ac.uk>
A. Melandri (INAF/OAB), C. Guidorzi (U. Ferrara), J. Japelj (U.
Ljubljana), D. Kopac (U. Ljubljana), C.G. Mundell (LJMU) and A. Gomboc
(U. Ljubljana) report:
The 2-m Faulkes Telescope South automatically began observing GRB
130722A (Troja et al. GCN Circ. 15013) on July 22 2013 at 08:21:29 UT
(~130 s after the burst trigger).
We find a fading object at coordinates
RA(2000.0)= 17:22:36.47
Dec(2000.0)= -02:58:21.6 (error 1.3")
with the following magnitudes
Mid time from Total Exp Filter Magnitude
trigger (min) (s)
--------------------------------------------------------------
12.37 1x30 R 18.0 +- 0.1
18.07 1x60 R 18.3 +- 0.1
--------------------------------------------------------------
Magnitudes are calibrated against nearby USNO-B1 stars, performing
aperture photometry of the proposed optical counterpart above together
with the nearby object located at RA(2000.0)=17:22:36.54,
Dec(2000.0)=-02:58:22.1. The latter might be related to the OT, has a
distance of 1.2" from the candidate and a catalogued magnitude of
R2=19.7. It looks extended and might be the host galaxy of GRB 130722A.