TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1675 SUBJECT: GRB021104(=H2434): A Long, X-Ray-Rich GRB Localized by HETE DATE: 02/11/05 03:59:54 GMT FROM: Don Lamb at U.Chicago <lamb@oddjob.uchicago.edu> T. Tamagawa, Y. Shirasaki, C. Graziani, M. Matsuoka, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, T. Donaghy, Y. Nakagawa, D. Takahashi, M. Suzuki, R. Satoh, and Y. Urata, on behalf of the HETE WXM Team; G. Ricker, J-L Atteia, N. Kawai, D. Lamb, and S. Woosley on behalf of the HETE Science Team; N. Butler, G. Crew, J. Doty, G. Prigozhin, R. Vanderspek, J. Villasenor, T. Cline, J. G. Jernigan, A. Levine, F. Martel, E. Morgan, G. Azzibrouck, J. Braga, R. Manchanda, and G. Pizzichini, on behalf of the HETE Operations and HETE Optical-SXC Teams; M. Boer, J-F Olive, J-P Dezalay, C. Barraud and K. Hurley on behalf of the HETE FREGATE Team; write: At 07:01:02.93 UTC (25262.93 s UT) on 4 Nov 2002, the HETE FREGATE and WXM instruments detected event H2434, a long, X-ray-rich GRB. Ground analysis of the WXM data for the burst produced a location, which was reported in a GCN Position Notice at 9:47 UT, 166 minutes after the burst. The WXM localization SNR was 5. The WXM location can be expressed as a 90% confidence rectangle that is approximately 24 arcminutes in width and 42 arcminutes in length. The corners of the rectangle lie at the following J2000 coordinates: RA = 3h 52m 40.3s, Dec = 38o 19' 26" RA = 3h 54m 44.6s, Dec = 38o 17' 10" RA = 3h 54m 56.2s, Dec = 37o 34' 59" RA = 3h 52m 52.6s, Dec = 37o 37' 12". The burst duration in the 8-40 keV band was ~26s. A total of 2120 counts were detected during that interval, corresponding to a fluence of ~4 x 10-7 ergs cm-2 . The peak flux was >3 x 10-8 ergs cm-2 s-1 (i.e., >1 x Crab flux). A light curve for GRB021104 is provided at the following URL: http://space.mit.edu/HETE/Bursts/GRB021104/ This message is citable.