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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2235 SUBJECT: GRB030519B (=H2716): A Long, Bright GRB Localized by the HETE WXM DATE: 03/05/20 01:58:52 GMT FROM: Don Lamb at U.Chicago <lamb@oddjob.uchicago.edu> D. Lamb, G. Ricker, J-L Atteia, N. Kawai, and S. Woosley on behalf of the HETE Science Team; J. Doty, R. Vanderspek, G. Crew, J. Villasenor, G. Monnelly, N. Butler, T. Cline, J. G. Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin, G. Azzibrouck, J. Braga, R. Manchanda, and G. Pizzichini, on behalf of the HETE Operations and HETE Optical-SXC Teams; Y. Shirasaki, C. Graziani, T. Donaghy, M. Matsuoka, M. Suzuki, T. Tamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, Y. Nakagawa, D. Takahashi, R. Satoh, and Y. Urata, on behalf of the HETE WXM Team; M. Boer, J-F Olive, J-P Dezalay, C. Barraud and K. Hurley on behalf of the HETE FREGATE Team; write: At 14:04:53.56 UTC (50693.56 UT) on 3 May 2003, the HETE FREGATE and WXM instruments detected event H2716, a long, bright GRB. The burst triggered FREGATE in the 30-400 keV energy band. The WXM flight software detected the GRB and calculated a location, which was reported in a GCN Notice at 14:05:30 UT. However, the direction of the burst source was such that it illuminated only the Y-detector. Consequently, the WXM flight localization was incorrect. Ground analysis of the WXM data produced a localization that was reported in a GCN Notice at 15:44:46 UT, 100 minutes after the burst. The WXM ground localization SNR was 12. The localization can be expressed as a 90% confidence rectangle which is 24 arcminutes in width and 4.5 degrees in length. The coordinates of the center of the rectangle are WXM-Ground: R.A. = +15h 59m 02s, Dec. = -33d 29' 18" (J2000), and the corners of the rectangle lie at: R.A. = 16h 09m 54s, Dec. = -33d 16' 26", R.A. = 16h 09m 41s, Dec. = -33d 33' 40", R.A. = 15h 48m 24s, Dec. = -33d 24' 25", R.A. = 15h 48m 08s, Dec. = -33d 42' 43" (J2000). The width of the rectangle corresponds to the localization of the burst in the Y-camera, and the length of the rectangle corresponds to the the constraints on the X location of the burst deduced from the illumination pattern on the wires of the Y-detector. The T_90 duration of the burst in the 30-400 keV band was > 10 s. A light curve and skymap for GRB030519B will soon be provided at the following URL: http://space.mit.edu/HETE/Bursts/GRB030519B
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