GCN Circular 4224
H. Mito, Y. Nakada(Tokyo Univ.), H. Nakanishi(NAOJ), F. Egusa, S. Komugi(Tokyo Univ.), K. Huang(IANCU), Y. Urata(RIKEN) on behalf of EAFON report: "We have imaged entire error region of GRB051109B(Tagliaferri et al. GCN 4222, Swift trigger=163170) using Kiso 1.05m Schmidt telescope. After end of twilight, we have started B and R band observations at 09:12:07 (UT). Comparison with DSS images and USNO-B catalog, there is no new source brighter than B=20.9, R=20.2. There is also no significant signals at the UVOT position reported by Tagliaferri et al (GCN 4222). ========================================== Delay time(min) Filter Limiting mag.(SN=3) 32.5 R 20.2 45.7 B 20.9 ========================================== This message may be cited."