{
  "bibcode": "2005GCN..3189....1S",
  "body": "GRB 050408 (=H3711):  A Long X-Ray-Rich GRB Detected by HETE\n\nT. Sakamoto, G. Ricker, J-L. Atteia, N. Kawai, D. Lamb, and S. Woosley,\non behalf of the HETE Science Team;\n\nM. Arimoto, T. Donaghy, E. Fenimore, M. Galassi, C. Graziani,\nJ. Kotoku, M. Maetou, M. Matsuoka, Y. Nakagawa, R. Sato, Y. Shirasaki,\nM. Suzuki, T. Tamagawa, K. Tanaka, Y. Yamamoto, and A. Yoshida, on\nbehalf of the HETE WXM Team;\n\nN. Butler, G. Crew, J. Doty, G. Prigozhin, R. Vanderspek,\nJ. Villasenor, J. G. Jernigan, A. Levine, G. Azzibrouck, J. Braga,\nR. Manchanda, and G. Pizzichini, on behalf of the HETE Operations and\nHETE Optical-SXC Teams;\n\nM. Boer, J-F Olive, J-P Dezalay, and K. Hurley, on behalf of the HETE\nFREGATE Team;\n\nreport:\n\n\nThe HETE FREGATE, WXM, and SXC instruments detected GRB 050408 (=H3711)\nat 16:22:50.93 UT (58970.93 SOD) on 8 April 2005.  WXM and SXC flight\nlocalizations were reported in a GCN Notice issued at 16:23:02, which\nwas 11 sec after the burst trigger and while the burst was still in\nprogress.\n\nThe final WXM and SXC flight localizations were reported in a GCN\nNotice issued at 16:23:13 UT.  The final WXM flight localization can be\nexpressed as a circle of 14 arcminutes radius (90% confidence) that is\ncentered at\n\nWXM-Flight:  RA = 12h 01m 55s, DEC = +10d 51' 38\" (J2000).\n\nThe final SXC flight localization can be expressed as a circle of 150\narcseconds radius that is centered at\n\nSXC-Flight:  RA = +12h 02m 15s, DEC = +10d 51' 03\" (J2000).\n\n\nGround analysis produced an updated SXC localization that was reported\nin a GCN Notice issued at 17:36:02.  This ground SXC localization can \nbe expressed as a circle of 80 arcseconds radius that is centered at\n\n\nSXC-Ground:  RA = +12h 02m 15s, DEC = +10d 52' 01\" (J2000).\n\n\nThe burst has a duration T_90 of ~34 seconds in 7-40 keV and 7-80 keV,\nand T_90 of ~15 seconds in 30-400 keV.  Preliminary spectral analyses\nshow the 2-30 keV fluence of GRB 050408 to be ~1.4 x 10-6 ergs cm-2 and\nthe 30-400 keV fluence to be ~1.9 x 10-6 ergs cm-2.  Therefore \nGRB 050408 is an \"X-ray-rich\" GRB.\n\nA light curve, skymap, and spectral information for GRB 050408 are\nprovided at the following URL:\n\nhttp://space.mit.edu/HETE/Bursts/GRB050408\n\nThis message may be cited.",
  "circularId": 3189,
  "createdOn": 1112984622000,
  "email": "lamb@oddjob.uchicago.edu",
  "subject": "GRB 050408 (=H3711):  A Long X-Ray-Rich GRB Detected by HETE",
  "submitter": "Don Lamb at U.Chicago  <lamb@oddjob.uchicago.edu>",
  "eventId": "GRB 050408"
}