GCN Circular 6315
Subject
GRB 070419A: Faulkes Telescope North Optical Observations
Date
2007-04-19T15:38:29Z (18 years ago)
From
James Smith at ARI,Liverpool John Moors U <rjs@astro.livjm.ac.uk>
R.J. Smith, C.G. Mundell, S.N. Fraser, I.A. Steele, C.J. Mottram, A.
Melandri, D.F. Bersier, M.F. Bode (Liverpool JMU), C. Guidorzi
(Uni-Bicocca/INAF-OAB), A. Gomboc (Ljubljana), P. O'Brien, E. Rol, N.
Bannister (U. Leicester) report on behalf of the RoboNet GRB
collaboration
The 2-m Faulkes North Telescope (Hawaii) reacted to the Swift burst
GRB070419A
(Stamatikos et al. GCN 6302). Observations were delayed by scheduled
engineering
work and only started about 37 min after the trigger time. BRi
observations continued
until 104min after the trigger.
We detect the optical transient reported by Chornock et al (GCN 6304)
in R and i' band filters
and measure a power law decay index of ~ 1.5 throughout the hour of
observation.
UTC minutes_since_trigger Mag
10:49:46.5 50.36 g' > 19.8 (limit only)
10:51:20.8 51.91 r' = 20.37
10:53:07.9 53.70 i' = 20.22
Magnitudes are based on comparison with SDSS magnitudes of the adjacent
star
SDSS J121057.55+395539.9.
The target has set and further observations are not currently ongoing
with this telescope.