GCN Circular 2730
Subject
XRF040916: continuing decay of OT
Date
2004-09-21T12:09:48Z (20 years ago)
From
George Kosugi at Subaru Telescope <george@subaru.naoj.org>
G. Kosugi, N. Kawai, A. Tajitsu, and H. Furusawa
on behalf of the Subaru GRB Team:
We have observed the entire HETE error box for XRF040916 (=H3558,
Yamazaki et al., GCN 2712; Yamamoto et al. GCN 2713), with Subaru
Suprime Cam beginning at around 6:00 UT on September 20, 2004 in
z'-, Ic-, Rc-, V-, and B-bands. The observed field was centered
at the proposed OT candidate reported by Kosugi et al. GCN 2726.
The OT was clearly detected in all 5 bands, and shows apparent
decay of flux in Ic-, Rc-, and B-bands compared with our
previous observations on September 18. Rc-band magnitude of OT
at Septempber 20.43 UT was approximately Rc=25.
Composite color images are posted at:
http://www.naoj.org/staff/george/Distribute/XRF040916/XRF040916.html
OT is located at the center of the images.
Due to change of instruments, we cannot continue optical monitoring of
OT with Subaru for the next two weeks. Follow-up optical observation
of the OT is strongly encouraged for possible supernova rebrightening.
This message may be cited.