TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2620 SUBJECT: XRF040701 (=U11548): a bright XRF detected by HETE DATE: 04/07/03 15:58:32 GMT FROM: Roland Vanderspek at MIT XRF040701 (=U11548): a bright XRF detected by HETE C. Barraud, G. Ricker, J-L. Atteia, N. Kawai, D. Lamb, and S. Woosley, on behalf of the HETE Science Team; T. Donaghy, E. Fenimore, M. Galassi, C. Graziani, M. Matsuoka, Y. Nakagawa, T. Sakamoto, R. Sato, Y. Shirasaki, M. Suzuki, T. Tamagawa, K. Torii, Y. Urata, T. Yamazaki, Y. Yamamoto, and A. Yoshida, on behalf of the HETE WXM Team; N. Butler, G. Crew, J. Doty, A. Dullighan, G. Prigozhin, R. Vanderspek, J. Villasenor, J. G. Jernigan, A. Levine, 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, and K. Hurley, on behalf of the HETE FREGATE Team report: Post-processing analysis of HETE data has revealed the presence of XRF 040701, a bright XRF. The burst was detected at 13:00:55 UT and had a duration of roughly 60 seconds. The XRF has been localized to a circle of radius 8' centered at RA = 20h 47m 46.3s, dec = -40d 14m 13s (J2000). Preliminary spectral analysis shows the burst can be best fit with a power law of index 2.395 +/- 0.3; the 2-25 keV energy fluence is 4.5 +/- 0.8 x 10^-7 erg/cm2. Details of this burst can be found on the HETE web page at http://space.mit.edu/HETE/Bursts/GRB040701 This message may be cited.