GCN Circular 6050
Subject
GRB 070125: MITSuME Okayama optical observation
Event
Date
2007-01-29T03:34:14Z (19 years ago)
From
Michitoshi Yoshida at Okayama Astrophysical Obs <yoshida@oao.nao.ac.jp>
M. Yoshida, K. Yanagisawa, (OAO, NAOJ) and N. Kawai (Tokyo Tech)
report on behalf of the MITSuME collaboration:
We detected the optical afterglow candidate of GRB 070125
reported by by Cenko and Fox (GCN 6028) with the 50cm MITSuME
Telescope at Okayama Astrophysical Observatory on January 26
UT. Photometric calibration was done using USNO-B1.0 catalog
magnitudes of eight stars around the target. The results are
following.
UT 26 January 2007 12:25 - 17:23 mid-UT 14:53
total exp time 123 min. (1 min. exp. x 123 frames)
------------------------------
g' 19.6 mag. +/- 0.2 mag.
Rc 18.8 mag. +/- 0.2 mag.
Ic 18.0 mag. +/- 0.3 mag.
------------------------------
Time variability in Rc
UT mid-UT exp.time Rc mag.
-----------------------------------------------
12:25 - 13:06 12:45 30 min. 18.9 +/- 0.3
13:07 - 14:35 13:51 37 min. 19.0 +/- 0.3
16:01 - 16:44 16:22 30 min. 18.7 +/- 0.2
16:44 - 17:23 17:03 26 min. 19.4 +/- 0.4
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$B!!!!5HEDF;Mx(B
$B9qN)E7J8Bf!!2,;3E7BNJ*M}4QB,=j!!=jD9(B
Michitoshi Yoshida, Dr.
Director of Okayama Astrophysical Observatory,
National Astronomical Observatory of Japan
Phone:+81-865-44-2155 FAX:+81-865-44-2360
yoshida@oao.nao.ac.jp
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