TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2436 SUBJECT: Lulin optical follow-up observations of GRB031026 DATE: 03/10/30 07:32:59 GMT FROM: Kuiyun Huang at IANCU GCN Circular Title: Lulin optical follow-up observations of GRB031026 A.C. Chen, H.C. Ting, H.C. Lin, K.Y. Huang, D. Kinoshita,W.H. Ip(NCU) Y. Urata and T. Tamagawa (RIKEN) report: "We have observed the entire region of HETE-2 error circle of GRB031026 (N. Butler et al. GCN2429) with 1.0-m telescope Lulin observatory (Institute of Astronomy, National Central University, Taiwan) at 26.48-26.72 Oct 2003, corresponding 6-12 hours after the burst. We have imaged 9 fields by CCD camera (10'x10' field of view). These average limiting magnitudes is about 20.9 (SN=3, compared with USNO-A2.0 red magnitudes). Comparing with Digitized Sky Survey (DSS2) image, there are no new object down to the limiting magnitude." The observation is summarized as follows: --------------------------------------------------------------------- Field RA DEC Start filter Exp.(sec) Limit mag. time(UT) 1 03:17:55.5 +28:31:40 11:33 R 300 x 3 21.2 2 03:17:56.8 +28:21:41 11:57 R 300 x 3 20.5 3 03:17:58.1 +28:11:42 12:23 R 300 x 3 20.0 4 03:19:27.2 +28:22:14 12:42 R 300 x 3 20.3 5 03:19:26.0 +28:32:13 13:01 R 300 x 3 21.1 6 03:19:28.4 +28:12:15 13:20 R 300 x 3 21.2 7 03:18:42.0 +28:21:58 17:02 R 300 x 1 21.3 8 03:18:40.8 +28:31:57 17:09 R 300 x 1 20.9 9 03:18:43.2 +28:11:59 17:18 R 300 x 1 21.5 --------------------------------------------------------------------- This message may be cited.