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GCN Circular 7686

Subject
GRB 080506: Optical observation with KANATA/TRISPEC
Date
2008-05-06T20:56:40Z (16 years ago)
From
Koji Kawabata at HASC,Hiroshima U <kawabtkj@hiroshima-u.ac.jp>
K. S. Kawabata, M. Sasada, M. Uemura, T. Yamashita and T. Ohsugi
(Hiroshima Univ.) and R. G. Lundock (Tohoku Univ.) report on behalf
of KANATA/TRISPEC observation team:

  We performed a series of simultaneous optical(Rc) and NIR (J, Ks)
imaging observations for the optical counterpart associated with
GRB 080506 (Baumgartner et al, GCN 7685) using TRISPEC attached to 
the 1.5-m KANATA telescope. Our quick-look analysis showed that Rc
magnitude of the counterpart was 17.5 at 220 sec after the BAT
trigger. It then faded and reached 19.5 at ~5050 sec. We used USNO
A2.0 1275-16800533 (R=15.1) and 1275-16801542 (R=15.1) stars for
comparison. Further analysis is ongoing.
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