TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1068 SUBJECT: SGR1806-20: Localization by HETE DATE: 01/06/18 21:45:45 GMT FROM: George Ricker at MIT SGR1806-20: Localization by HETE G. Ricker, D. Lamb, and S. Woosley on behalf of the HETE Science Team; R. Vanderspek, G. Crew, J. Doty, G. Monnelly, J. Villasenor; N. Butler, T. Cline, J.G. Jernigan, A. Levine, F. Martel, G. Pizzichini, and G. Prigozhin, on behalf of the HETE Operations and HETE Optical-SXC Teams; N. Kawai, M. Matsuoka, Y. Shirasaki, T. Tamagawa, A. Yoshida, E. Fenimore, M. Galassi, and C. Graziani, on behalf of the HETE WXM Team; J-L Atteia, M. Boer, J-F Olive, J-P Dezalay, and K. Hurley on behalf of the HETE FREGATE Team; write: At 19:42:49 UT on 18 June, the HETE FREGATE and WXM instruments detected and localized burst emission from the vicinity of SGR1806-20, a soft gamma-ray repeater. This event may indicate the onset of a new period of activity by this source. The coordinates (J2000) of the burst source were: R.A. = 272.0265 deg. Dec. = -20.2743 deg The error circle for the localization is 36 arcmin in radius. SGR1806-20 lies 11.8 arcmin from the HETE position. [Another galactic X-ray source, GX9+1, lies 100 arcmin from the HETE position.] The burst duration in the 8-40 keV band was <300 ms. A total of 864 counts were detected during that interval, corresponding to a flux of >10 times Crab. Follow-up observations of this transient are encouraged. Additional information on this burst detection (including light curves), as well as for the HETE mission, will be available at: http://space.mit.edu/HETE/ Acronyms: HETE=High Energy Transient Explorer FREGATE=French Gamma Ray Telescope WXM=Wide Field X-ray Monitor SXC=Soft X-ray Camera This message is citeable.