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GCN Circular 9292

GRB 090426: GAO 150cm telescope Optical Observation
2009-04-29T14:27:50Z (15 years ago)
Kenzo Kinugasa at Gunma Astro. Obs/Japan <>
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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