TITLE: GCN GRB OBSERVATION REPORT NUMBER: 3548 SUBJECT: H3804: A Possible New XRB Detected by HETE DATE: 05/06/14 20:18:59 GMT FROM: Roland Vanderspek at MIT M. Arimoto, 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, J. Kotoku, M. Maetou, M. Matsuoka, Y. Nakagawa, T. Sakamoto, R. Sato, Y. Shirasaki, M. Suzuki, T. Tamagawa, K. Tanaka, Y. Yamamoto, and A. Yoshida, on behalf of the HETE WXM Team; E. Morgan, N. Butler, G. Crew, J. Doty, 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: The HETE Fregate, WXM and SXC instruments detected burst H3804 at 11:22 UT on 14 June 2005. The burst is soft (all photons < 30 keV), has a FRED-like profile, and exhibits the general spectral and temporal characteristics of a type I X-ray burst. H3804 is localized by the WXM and SXC to a circle of radius 80" centered at RA = 19h 00m 6.4s, Dec = -24d 54' 54.7" (J2000). H3804 is situated within 15 degrees of the galactic center: l=11, b=-13. It does not appear to coincide with any entry for an X-ray source in the SIMBAD catalog. Thus, it is very likely to be a new, previously uncatalogued XRB, and not an XRF or a GRB, although we cannot absolutely exclude that possibility. This message may be cited.