GCN Circular 7863
Subject
GRB080605: optical observation with the MITSuME-OAO telescope
Date
2008-06-09T00:24:33Z (16 years ago)
From
Michitoshi Yoshida at Okayama Astrophysical Obs <yoshida@oao.nao.ac.jp>
M. Yoshida, K. Yanagisawa, D. Kuroda, Y. Shimizu, S. Nagayama,
H. Toda (OAO, NAOJ) and N. Kawai (Tokyo Tech) report on behalf
of the MITSuME collaboration:
We performed optical imaging observation (Rc, and Ic) of the field
of GRB 080605 (Sbarufatti et al., GCN 7828) with 50cm MITSuME
telescope at Okayama Astrophysical Observatory June 6 2008 UT.
We detected a point source at the UVOT position of the optical
afterglow (Kuin et al., GCN 7844). Differential photometry was
made using a USNO B1.0 star, USNO-ID 0940-0289655 (Kann et al.,
GCN 7845). The Ic-band magnitude of the source was almost constant
from T-T0 = 0.516 to 0.756. The source is about 1.5 magnitude
fainter in Rc-band than in Ic-band. These results are consistent
with other reports (Kann et al., GCN 7845, Rumyantsev et al.,
GCN 7857).
MITSuME observation start: 2008-06-06 11:35:11 UT
mid-UT T-T0(days) exp-T Ic
(2008-06-06)
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12:11:27 0.516314 60 min 19.03 +/- 0.38
12:48:05 0.541753 60 min 19.00 +/- 0.29
14:00:54 0.592315 60 min 18.85 +/- 0.18
15:15:44 0.644288 60 min 19.03 +/- 0.22
16:30:50 0.696429 60 min 18.82 +/- 0.21
17:56:24 0.755856 80 min 18.87 +/- 0.30
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mid-UT
(2008-06-06) T-T0(days) ext-T Rc
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15:52:20 0.669745 120 min 20.58 +/- 0.32
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