[vsnet-grb-info 6596] GRB 080905A: MITSuME Akeno optical upper limits

Mon Sep 8 22:33:32 JST 2008

TITLE:   GCN CIRCULAR
NUMBER:  8202
SUBJECT: GRB 080905A: MITSuME Akeno optical upper limits
DATE:    08/09/08 13:33:19 GMT
FROM:    Nobuyuki Kawai at Tokyo Tech  <nkawai at hp.phys.titech.ac.jp>

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H. Nakajima, T. Shimokawabe, Y.A. Mori, Y. Kudou, and N. Kawai (Tokyo  
Tech) report on behalf of the MITSuME collaboration:

We performed optical imaging observation of the field of GRB 080905A
(C. Pagani et al. GCN 8180) with the 3-color 50cm MITSuME Telescope at
Akeno, Japan from 12:40:12 UT (42min after the trigger) to 14:32:07 UT.
In the co-added images of Ic, Rc, and g' bands, we did not detect any
afterglow candidate in the XRT error circle. The 3-sigma limiting
magnitudes based on USNO-B1.0 (I-band) and NOMAD (R-band,g'-band)
stars are following:

Filter Start(UT) End(UT)  Exposure   LimitMag
---------------------------------------------------
g'     12:40:12  13:14:31 30 x 60 s  17.1
Rc     12:40:12  13:14:31 30 x 60 s  17.6
Ic     12:40:12  13:14:31 30 x 60 s  17.6
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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; -=
webkit-line-break: after-white-space; "><span class=3D"Apple-style-span=
" style=3D"font-family: -webkit-monospace; font-size: 11px; ">H. Nakaji=
ma, T. Shimokawabe, Y.A. Mori, Y. Kudou, and N. Kawai (Tokyo&nbsp;Tech)=
 report on behalf of the MITSuME collaboration:<br><br>We performed opt=
ical imaging observation of the field of GRB 080905A<br>(C. Pagani et a=
l. GCN 8180) with the 3-color 50cm MITSuME Telescope at<br>Akeno, Japan=
 from 12:40:12 UT (42min after the trigger) to 14:32:07 UT.<br>In the c=
o-added images of Ic, Rc, and g' bands, we did not detect any<br>afterg=
low candidate in the XRT error circle. The 3-sigma limiting<br>magnitud=
es based on USNO-B1.0 (I-band) and NOMAD (R-band,g'-band)<br>stars are =
following:<br><br>Filter Start(UT) End(UT) &nbsp;Exposure &nbsp; LimitM=
ag<br>---------------------------------------------------<br>g' &nbsp; =
&nbsp; 12:40:12 &nbsp;13:14:31 30 x 60 s &nbsp;17.1<br>Rc &nbsp; &nbsp;=
 12:40:12 &nbsp;13:14:31 30 x 60 s &nbsp;17.6<br>Ic &nbsp; &nbsp; 12:40=
:12 &nbsp;13:14:31 30 x 60 s &nbsp;17.6<br>----------------------------=
-----------------------</span></body></html>
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