TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1851 SUBJECT: GRB030131: Kiso optical limit for corrected position DATE: 03/02/04 06:50:45 GMT FROM: Yuji Urata at RIKEN T. Soyano, H. Mito and Y. Urata on behalf of the Kiso GRB team, M. Ishiguro (ISAS) : "We have observed the entire corrected localization region of GRB030131(Mereghetti et al., GCN 1847) 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 limiting magnitude estimated from USNO-A2.0 stars is R~20. Comparison with DSS II red images, no new object was detected down to the limiting magnitude. We also could not identify the candidate of Okasanen (GCN 1849) at first and second epoch." This message may be cited.