GCN Circular 19939
Subject
GRB160925A / Fermi 496473540: MASTER optical transient confirmation by LCOGT-FTN
Date
2016-09-26T10:26:53Z (8 years ago)
From
Cristiano Guidorzi at Ferrara U,Italy <guidorzi@fe.infn.it>
C. Guidorzi (U. Ferrara), S. Kobayashi, I.A. Steele (LJMU), C.G. Mundell
(U. Bath), A. Gomboc (U. Nova Gorica) on behalf of a large collaboration
report:
The 2-m LCOGT Faulkes Telescope North began observing the MASTER optical
transient possibly associated to GRB160925A/Fermi 496473540 (Lipunov et
al., GCN 19938) on September 26, 08:11 UT (0.6 days since MASTER
observations). We confirm the presence of an uncatalogued object at the
following position:
RA(J2000)= 22:28:17.82
Dec(J2000)= -14:56:56.6
with an uncertainty of 1.0 arcsec and R=16.17 +- 0.01 mag, I=16.00+-0.01
mag, as calibrated against USNOB-1 star 22:28:23.443, -14:57:33.95 using
R2=13.69 mag, I=13.00 mag.
Given its ecliptic coordinates (333 deg, -5 deg), with reference to the
IAU Minor Planet Center we checked that there is no known minor planet
or comet brighter than V=20.0 mag within 10 arcminutes at the epoch of
our observations.