GCN Circular 4296
Subject
GRB 051109B: GAO 150cm telescope Optical limit
Event
Date
2005-11-22T06:13:34Z (20 years ago)
From
Kenzo Kinugasa at Gunma Astro. Obs/Japan <kinugasa@astron.pref.gunma.jp>
K. Kinugasa (Gunma Astronomical Observatory) and K. Torii (Osaka U.) report:
The error region of GRB 051109B (Tagliaferri, et al. GCN 4222) was imaged
with the LN2 cooled CCD Camera atattched on the 150 cm telescope of the
Gunma Astronomical Observatory. Starting at 15:28 UT (6.8 hours after the
burst), V, Rc, and Ic frames were acquired.
We do not identify an optical counterpart for the X-ray afterglow (Campana,
et al. GCN 4226). Following 3-sigma upper limits are derived for the stacked
frames relative to USNO-B1.0 magnitudes.
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MidUT Filter Mag Exposure
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15:54 Rc >20.2 180s x 5
16:10 Ic >18.4 60s x 10
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