[vsnet-grb-info 2399] GRB 051109B: ROTSE-III Optical Limits

GCN Circulars gcncirc at capella.gsfc.nasa.gov
Thu Nov 10 05:37:53 JST 2005


TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4236
SUBJECT: GRB 051109B: ROTSE-III Optical Limits
DATE:    05/11/09 20:35:40 GMT
FROM:    Wiphu Rujopakarn at U Michigan/ROTSE  <wiphu at umich.edu>

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W. Rujopakarn (U Mich), E.S. Rykoff (U Mich), F. Yuan (U Mich) report on =
behalf of the ROTSE collaboration:

ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB =
051109B (Swift trigger 163170), producing images beginning 9.1 s after =
the GCN notice time. An automated response took the first image at =
08:40:29.1 UT, 50.7 s after the burst, under fair conditions. We took 10 =
5-sec, 10 20-sec and 50 60-sec exposures. These unfiltered images are =
calibrated relative to USNO A2.0 (R).

Comparison to the DSS (second epoch) reveals no new sources within the =
3-sigma error circle, for both single images and coadding into sets of =
10. We also note that we found no new object within the error circle of =
XRT position given by Campana et al. (GCN 4226). Individual images have =
limiting magnitudes ranging from 15.8-17.8; we set the following =
specific limits.

start UT       end UT      t_exp(s)   mlim   t_start-tGRB(s)  Coadd?
--------------------------------------------------------------------
08:40:29.1   08:40:34.1      5        16.8        49.8          N
08:40:29.1   08:41:51.1     82        18.0        49.8          Y
08:41:51.4   08:44:50.4    299        17.4       132.1          Y
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<DIV><FONT size=3D2>W. Rujopakarn (U Mich), E.S. Rykoff (U Mich), F. =
Yuan (U Mich)=20
report on behalf of the ROTSE collaboration:</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>ROTSE-IIIb, located at McDonald Observatory, Texas, =
responded=20
to GRB 051109B (Swift trigger 163170), producing images beginning 9.1 s =
after=20
the GCN notice time. An automated response took the first image at =
08:40:29.1=20
UT, 50.7 s after the burst, under fair conditions. We took 10 5-sec, 10 =
20-sec=20
and 50 60-sec exposures. These unfiltered images are calibrated relative =
to USNO=20
A2.0 (R).</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Comparison to the DSS (second epoch) reveals no new =
sources=20
within the 3-sigma error circle, for both single images and coadding =
into sets=20
of 10. We also note that we found no new object within the error circle =
of XRT=20
position given by Campana et al. (GCN 4226). Individual images have =
limiting=20
magnitudes ranging from 15.8-17.8; we set the following specific=20
limits.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>start UT&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end=20
UT&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; t_exp(s)&nbsp;&nbsp; mlim&nbsp;&nbsp;=20
t_start-tGRB(s)&nbsp;=20
Coadd?<BR>---------------------------------------------------------------=
-----<BR>08:40:29.1&nbsp;&nbsp;=20
08:40:34.1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
5&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
16.8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
49.8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
N<BR>08:40:29.1&nbsp;&nbsp; 08:41:51.1&nbsp;&nbsp;&nbsp;&nbsp;=20
82&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
18.0&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
49.8&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
Y<BR>08:41:51.4&nbsp;&nbsp; 08:44:50.4&nbsp;&nbsp;&nbsp;=20
299&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
17.4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;=20
132.1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; =
Y</FONT></DIV>
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