TITLE: GCN CIRCULAR NUMBER: 6310 SUBJECT: GRB070419A, optical observation DATE: 07/04/19 14:30:54 GMT FROM: Eri Sonoda at U of Miyazaki/Japan R. Hara, E.Sonoda, S.Maeno, H. Tanaka, N. Ohmori, M.Yamauchi (University of Miyazaki) We have observed the field covering the error circle of GRB070419A (GCN 6302, M. Stamatikos et al.) with the unfiltered CCD camera on the 30-cm telescope at University of Miyazaki. The observation was started 10:24:34 UT, ~25 min after the Swift trigger time. We have compared our data of 30 sec exposures with the USNO-A2.0 catalog, the upper limits are as follows: -------------------------------------------------------------- Start(UT) End(UT) Num. of frames Limit (mag.) -------------------------------------------------------------- 10:42:40 10:43:10 1 ~16.2 10:42:40 10:53:36 10 ~17.7 ---------------------------------------------------------------