GCN Circular 1845
M. Ishiguro (ISAS) T. Soyano, H. Mito and Y. Urata on behalf of the Kiso GRB team: " We have observed the entire INTEGRAL error circle of GRB030131 (Gotz et al., GCN1838) with Kiso observatory 1.05 m Schmidt telescope. We obtained two R-band data sets (300 sec x 3 frames), starting at 15:36 UT and 18:45 UT. Our data; Date Time (UT) Exposure Limiting mag.(R, SN=3) 01-31 15:36:47 300s x 3 19.7 01-31 18:45:00 300s x 3 20.0 # Limiting magnitude was estimated by comparison with # U1200_07092706 13:27:46.834 +30:44:13.42 16.4 mag. Comparison with DSS II red images, no new object was detected down to the limiting magnitude. We also could not identify any variable objects in the region reported by Hurley et al (GCN1841) using a PSF matched image subtraction method." This message may be cited.