GCN Circular 3263
Subject
GRB 050412: Subaru observations
Event
Date
2005-04-15T05:13:27Z (21 years ago)
From
Nobuyuki Kawai at Tokyo Tech <nkawai@hp.phys.titech.ac.jp>
G. Kosugi, N. Kawai, K. Aoki, T. Hattori, K. Ohta, and T. Yamada
report on behalf of the Subaru GRB team:
"We have observed the Swift/XRT position of GRB 050412 reported by
Mangano et al.(GCN #3253) in Rc-band with FOCAS on the Subaru 8.2m
telescope atop Mauna Kea on the night of Apr.12. We obtained one 60s
image at 08:03 UT (2.3 hr after the event) and three 600s images at
12:55 UT (7.2 hr after the event).
Our first image shows no afterglow candidates inside the XRT error
circle (5" in radius) down to Rc=24.9 (3-sigma). A galaxy 9" SW from
the XRT position first mentioned by Jensen et al. (GCN #3243) is found
to be Rc=22.6 +/- 0.1.
Our second data set revealed an object almost at the center of the XRT
error circle with the magnitude of Rc=26.0 +/- 0.5. Due to the
marginal detection, we cannot determine whether it is a point source
or a galaxy."
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