{
  "bibcode": "2003GCN..1997....1V",
  "body": "R. Vanderspek, G. Crew, J. Doty, J. Villasenor, G. Monnelly, N. Butler,\nT. Cline, J.G. Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin,\nG. Azzibrouck, J. Braga, R. Manchanda, and G. Pizzichini, on behalf of\nthe HETE Operations and HETE Optical-SXC Teams;\n\nG. Ricker, J-L Atteia, N. Kawai, D. Lamb, and S. Woosley on behalf of\nthe HETE Science Team;\n\nT. Donaghy, M. Suzuki, Y. Shirasaki, C. Graziani, M. Matsuoka, T.\nTamagawa, K. Torii, T. Sakamoto, A. Yoshida, E. Fenimore, M. Galassi,\nT. Tavenner, Y. Nakagawa, D. Takahashi, R. Satoh, and Y. Urata, on\nbehalf of the HETE WXM Team;\n\nM. Boer, J-F Olive, J-P Dezalay, C.  Barraud and K. Hurley on behalf\nof the HETE FREGATE Team;\n\nwrite:\n\nAt 11:37:14.67 UTC (41834.67 s UT) on 29 Mar 2003, the HETE FREGATE,\nWXM, and SXC instruments detected event H2652, a long, extremely\nbright GRB.\n\nThe burst triggered FREGATE in the 6-120 keV energy band.  The burst\noccurred outside of the effective FOV of the WXM Y-camera.  Ground\nanalysis of the SXC data produced a localization that was reported in a\nGCN Notice at 12:50:24 UT, 73 minutes after the burst.  The SXC ground\nlocalization SNR was 20.  Further ground analysis of the SXC data has\nprovided an SXC localization that can be expressed as a 90% confidence\ncircle that is 2 arcminutes in radius and is centered at\n\nSXC-Ground:   RA = +10h 44m 50s, Dec = +21d 30' 54\" (J2000).\n\nThe SXC localization is dominated by systematic errors, which are\nlarger than usual because the burst occurred at the edge of the SXC\nFOV.  (The error circle radius of 2 arcminutes reported in the GCN\nNotice for H2652 did not include the larger systematic errors.)\n\nGround analysis of the WXM data produced a WXM localization.  The WXM\nground localization SNR is > 20.  The WXM localization can be expressed\nas a 90% confidence rectangle that is 12 arcminutes in width and 2.25\ndegrees in length.  The center of the rectangle lies at\n\nWXM-Ground:   RA = +10h 44m 24.7, Dec = +23d 20' 20\" (J2000),\n\nand its corners lie at\n\nRA = +10h 44m 39.6s, Dec = +23d 29' 20\",\nRA = +10h 43m 53.5s, Dec = +23d 26' 35\",\nRA = +10h 44m 09.8s, Dec = +21d 11' 38\",\nRA = +10h 44m 55.9s, Dec = +21d 14' 17\" (J2000).\n\nThe width of the WXM localization is dominated by systematic errors,\nwhich are larger than usual because the burst occurred at the edge of\nthe WXM FOV.  The WXM localization is a long, narrow strip because the\nburst occurred at the edge of the WXM FOV in a region of the sky that\nwould have been viewed by the YB-camera, which is not operational.\n\nThe burst duration in the 30-400 keV band was > 25 s. The fluence  of\nthe burst was ~1 x 10-4 ergs cm-2 and the peak flux over 1.2 s was > 7\nx 10-6 ergs cm-2 s-1 (i.e., > 100 x Crab flux) in the same energy band.\n\nA light curve and skymap for GRB030329 is provided at the following URL:\n\nhttp://space.mit.edu/HETE/Bursts/GRB030329\n\n[GCN OPS NOTE (29mar03): The \"...on 28 Mar 2003,...\" in the first line\nwas corrected to \"...on 29 Mar 2003,...\".]",
  "circularId": 1997,
  "createdOn": 1048967583000,
  "email": "lamb@oddjob.uchicago.edu",
  "subject": "GRB030329 (=H2652): A Long, Extremely Bright GRB Localized by the HETE WXM and SXC",
  "submitter": "Don Lamb at U.Chicago  <lamb@oddjob.uchicago.edu>",
  "eventId": "GRB 030329"
}