TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2510 SUBJECT: GRB031220: observation at Univercity of Miyazaki DATE: 04/01/07 13:25:20 GMT FROM: Shouta Maeno at U.of Miyazaki C.Fukami, S.maeno, K.Sakamoto, E.Sonoda, M.Yamauchi (Univercity of Miyazaki) "We have observed the field covering the entire SXC error box of GRB 031220 (HETE trigger 2976;triger time 03:29:56.7 UT) with the unfiltered CCD camera on the 30-cm telescope at Univercity of Miyazaki, beginning at 10:05:59 UT on Dec.20. After co-adding a set of 2 images of 30 sec exposure and CCD's field of view is 43arcmin. We compared with the USNO-A2.0 catalog. There is no new source brighter than 17.51 mag in the SXC error box. [GCN OPS NOTE (07jan04): This Circular was delayed 10.5 hours until a new account could be set up.]