GCN Circular 6552
Subject
GRB070616: Optical Observation by MITSuME Okayama
Date
2007-06-18T05:05:26Z (17 years ago)
From
Michitoshi Yoshida at Okayama Astrophysical Obs <yoshida@oao.nao.ac.jp>
M. Yoshida, K. Yanagisawa, Y. Shimizu, S. Nagayama (OAO, NAOJ)
and N. Kawai (Tokyo Tech) report on behalf of the MITSuME
collaboration:
We performed optical imaging observation (g', Rc, and Ic) of the
field of GRB 070616 (Starling et al. GCN 6542) with 50cm MITSuME
telescope at Okayama Astrophysical Observatory from UT 18:04:40
(1h 35m after burst) to UT 18:10:30 on June 16 2007.
We coadded 5 CCD frames for each band. Exposure time of each
frame is 1 minute. We made flux calibration using USNO B1.0
catalg. We could not identify new source at the position of the
afterglow candidate reported by Fatkhullin et al. (GCN 6547) and
Ugarte Postigo (GCN 6548). Three sigma limiting magnitudes of
our observation are listed below.
----------------------------------------------------
band mid-UT (2007) exp.time upper limit
g' June 16 18:07:35 5 x 1 min. 19.5 mag
Rc June 16 18:07:35 5 x 1 min. 18.9 mag
Ic June 16 18:07:35 5 x 1 min. 18.4 mag
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