{
  "bibcode": "2003GCN..2383....1S",
  "body": "GRB030913 (=H2849): A GRB Possibly Localized by HETE\n\nM. Suzuki, C. Graziani, J. Villasenor, G. Crew, R. Vanderspek,\nM. Galassi, G. Ricker, D. Lamb, N. Kawai, and S. Woosley on behalf \nof the HETE Science Team;\n\nG. Prigozhin, J. Doty, A. Dullighan, N. Butler, T. Cline, J.G. Jernigan, \nG. Azzibrouck, J. Braga, R. Manchanda, and G. Pizzichini, on behalf \nof the HETE Operations and HETE Optical-SXC Teams;\n\nY. Shirasaki, M. Matsuoka, T. Tamagawa, T. Sakamoto, A. Yoshida, \nK. Torii, Y. Nakagawa, D. Takahashi, R. Satoh, Y. Urata, E. Fenimore, \nand T. Donaghy, on behalf of the HETE WXM Team;\n\nJ-L Atteia, C. Barraud, M. Boer, J-F Olive, J-P Dezalay, and K. Hurley \non behalf of the HETE FREGATE Team;\n\nwrite:\n\nAt 17:06:57.52 UTC (61617.5 s UT) on 13 Sep 2002, the HETE FREGATE,\nWXM, and SXC instruments detected event H2849, a relatively short GRB.  \nThe WXM flight localization was reported in a GCN Position Notice at \n17:07:35 UT, 37 sec after the burst.  The attitude of the spacecraft \nexperienced a brief period of oscillations at just the time of GRB030913,\nwhich degraded the flight Y-detector localization and prevented us\nfrom confirming the flight localization to a high level of confidence\nin initial ground analyses.  For this reason, the flight localization\nwas retracted in a GCN Notice sent at 21:18 on 13 Sep 2002.\n\nFurther analyses show that it is possible that the flight localization \nwas indeed correct.  If you have observed the flight localization, we \nencourage you to examine it for the afterglow, in case it is correct.\nThe correct Y localization may be recoverable.\n\nThe WXM flight localization SNR was 3.0 in the X-detector and 2.2 in\nthe Y-detector.  The WXM flight localization can be expressed as a 90%\nconfidence circle that is 30 arcminutes in radius and is centered at\n\n  WXM-Ground:   RA = +20h 58m 02s, Dec = -02d 12' 32\" (J2000).\n\nIn the FREGATE 8-40 keV band, 8-80 keV band, and 30-400 keV band,\nthe burst had a duration of ~6 seconds (T90).  The burst significance\nwas 12 sigma in the 30-400 keV band, 6 sigma in the WXM 2-25 keV band.\nBased on preliminatry spectral fits, the 30-400 keV fluence is roughly \n6e-7 erg/cm2 and the 7-30 keV fluence is roughly 8e-8 erg/cm2.  \n\nFurther information (including a light curve) for GRB030913 is provided\nat the following URL:\n\n  http://space.mit.edu/HETE/Bursts/GRB030913\n\nThis message is citable.",
  "circularId": 2383,
  "createdOn": 1063670957000,
  "email": "roland@space.mit.edu",
  "subject": "GRB030913 (=H2849): A GRB Possibly Localized by HETE",
  "submitter": "Roland Vanderspek at MIT  <roland@space.mit.edu>",
  "eventId": "GRB 030913"
}