TITLE: GCN CIRCULAR NUMBER: 9188 SUBJECT: GRB 080408A: GAO 150cm telescope Optical Observation DATE: 09/04/22 10:47:58 GMT FROM: Kenzo Kinugasa at Gunma Astro. Obs/Japan K. Kinugasa, H. Takahashi, S. Honda, O. Hashimoto, H. Taguchi (Gunma Astronomical Observatory) report: The field of GRB 090408 (Stroh et al. GCN 9110) was observed with the 150 cm telescope of the Gunma Astronomical Observatory. Starting at 16:03 UT and 18.36 UT (1.03 and 2.58 hours after the trigger), Rc and Ic frames were acquired for sets of 5 x 3-min and 5 x 3-min exposures under a hazy sky condition. We did not detect any new point source within the BAT error circle to limiting magnitudes below relative to USNO-B1.0 R2 and I magnitudes. mid-UT exp band mag. ----------------------------------- 16:12:59 5x3min Rc > 20.1 16:34:40 5x3min Ic > 19.4 27:45:46 5x3min Rc > 20.3 28:15:37 5x3min Ic > 19.3