TITLE: GCN CIRCULAR NUMBER: 9189 SUBJECT: GRB 080410: GAO 150cm telescope Optical Observation DATE: 09/04/22 10:59:01 GMT FROM: Kenzo Kinugasa at Gunma Astro. Obs/Japan K. Kinugasa, S. Honda, O. Hashimoto, H. Takahashi, H. Taguchi (Gunma Astronomical Observatory) report: The field of GRB 090410 (Grupe et al. GCN 9122) was observed with the 150 cm telescope of the Gunma Astronomical Observatory. Starting at 18:33 UT (1.60 hours after the trigger), Rc and Ic frames were acquired for 3 x 3-min and 5 x 3-min exposures under a high airmass (sec z ~3) condition. We did not detect any new point source within the ground-calculated BAT error circle (Barthelmy et al. GCN 9123) to limiting magnitudes of Rc=19.0 and Ic=19.0 relative to USNO-B1.0 R2 and I magnitudes at the meantime of 18:41 UT and 18:56 UT, respectively.