GCN Circular 8085
Subject
GRB 080810: KANATA optical-NIR observation, update
Date
2008-08-10T19:35:44Z (16 years ago)
From
Makoto Uemura at Hiroshima U <uemuram@hiroshima-u.ac.jp>
M. Uemura, M. Yamanaka, Y. Ikejiri, K. Sakimoto, T. Ohsugi,
K.S. Kawabata, and A. Arai, report on behalf of the KANATA GRB team:
We continue the observation of GRB 080810 with the KANATA 1.5-m
telescope. We obtained V, J, and Ks-band images of the field
of the afterglow using TRISPEC.
The latest observation shows:
time(UT) mag. err exposure time
Aug. 2008
10.78444 18.92V 0.05 123sec * 10
10.78479 17.53J 0.31 72sec * 10
The light curve we obtained can be described with a simple
power-law decay between 420 and 20000 sec after the GRB trigger,
without an apparent break.
The power-law index is calculated to be 1.21+/-0.02.
The index is slightly, but significantly larger than that reported
in GCN 8084, implying a possible break around the very early
or very late phase of our observation period.
Further monitoring is encouraged.