GCN Circular 9292
Subject
GRB 090426: GAO 150cm telescope Optical Observation
Date
2009-04-29T14:27:50Z (15 years ago)
From
Kenzo Kinugasa at Gunma Astro. Obs/Japan <kinugasa@astron.pref.gunma.jp>
K. Kinugasa, S. Honda, O. Hashimoto, H. Takahashi, H. Taguchi
(Gunma Astronomical Observatory) report:
The position of GRB 090426 (Cummings et al., GCN 9254) was
observed with the 150 cm telescope of Gunma Astronomical
Observatory. Starting at 13:20 and 13:48 UT (0.52 and 1.0 hours
after the trigger), Ic and Rc frames were acquired for sets of
3 x 3-min and 5 x 5-min exposures, respectively.
We detected the optical counterpart (e.g., Xin et al., GCN 9255;
Oates et al., GCN 9265) in all frames. We estimated the Rc and Ic
magnitudes relative to USNO-B1.0 R2 and I, respectively.
mid-UT exp mag.
-----------------------------------
13:24:45 3x3min Ic=18.5+-0.3
14:03:58 5x5min Rc=19.9+-0.1
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