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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2261 SUBJECT: GRB030528(=H2724): Revised SXC Localization DATE: 03/05/31 23:04:24 GMT FROM: George Ricker at MIT <grr@space.mit.edu> GRB030528(=H2724): Revised SXC Localization J. Villasenor, N. Butler, G. Crew, J. Doty, G. Prigozhin, R. Vanderspek, T. Cline, J. G. Jernigan, A. Levine, F. Martel, E. Morgan, G. Monnelly, G. Azzibrouck, J. Braga, R. Manchanda, and G. Pizzichini, on behalf of the HETE Operations and HETE Optical-SXC Teams; G. Ricker, J-L Atteia, N. Kawai, D. Lamb, and S. Woosley on behalf of the HETE Science Team; C. Barraud, M. Boer, J-F Olive, J-P Dezalay, and K. Hurley on behalf of the HETE FREGATE Team; K. Torii, C. Graziani, Y. Shirasaki, T. Donaghy, M. Matsuoka, M. Suzuki, T. Tamagawa, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi, Y. Nakagawa, R. Satoh, Y. Urata, T. Yamazaki and Y. Yamamoto, on behalf of the HETE WXM Team; write: Further analysis of the spacecraft aspect data near the time of GRB030528 indicates that an additional systematic correction to the HETE SXC localization reported in GCN2256 (Atteia et al) is required. This analysis uses the known position of Sco X-1, which was within the SXC field-of-view at the time of GRB030528. We conclude that a best estimate location for GRB030528 is: RA (J2000) = 17h 03m 58s, Dec (J2000) = -22d 38m 00s with an error radius of 2.5 arcminutes. This revised location is displaced by 1.3 arcmin from the one reported in GCN2256. This message may be cited.
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