Gamma-ray Burst 021021

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  
  TITLE:          GCN/HETE BURST POSITION NOTICE
  NOTICE_DATE:    Tue 22 Oct 02 10:58:44 UT
  NOTICE_TYPE:    HETE Ground Analysis
  TRIGGER_NUM:    10623,   Seq_Num: 1
  GRB_DATE:       12568 TJD;   294 DOY;   02/10/21
  GRB_TIME:       67380.00 SOD {18:43:00.00} UT
  TRIGGER_SOURCE: Trigger on the 2-30 keV band.
  SC_-Z_RA:       183 [deg]
  SC_-Z_DEC:       20 [deg]
  SC_LONG:         78 [deg East]
  WXM_CNTR_RA:      4.347d {+00h 17m 23s} (J2000),
                    4.383d {+00h 17m 32s} (current),
                    3.707d {+00h 14m 50s} (1950)
  WXM_CNTR_DEC:    -1.617d {-01d 37' 00"} (J2000),
                   -1.601d {-01d 36' 04"} (current),
                   -1.895d {-01d 53' 40"} (1950)
  WXM_MAX_SIZE:   40.00 [arcmin] diameter
  WXM_LOC_SN:     4 sig/noise (pt src in image)
  WXM_IMAGE_SN:   X= 2.2 Y= 3.0 [sig/noise]
  WXM_LC_SN:      X= 3.9 Y= 3.9 [sig/noise]
  SUN_POSTN:      206.19d {+13h 44m 46s}  -10.83d {-10d 49' 58"}
  SUN_DIST:       154.99 [deg]
  MOON_POSTN:      32.29d {+02h 09m 10s}   +9.81d {+09d 48' 54"}
  MOON_DIST:       30.04 [deg]
  MOON_ILLUM:     100 [%]
  GAL_COORDS:     103.76,-63.21 [deg] galactic lon,lat of the burst
  ECL_COORDS:     3.35,-3.21 [deg] ecliptic lon,lat of the burst
  COMMENTS:       HETE Message.  
  COMMENTS:       6.1 sig/noise  on a 10.000 [sec] timescale  
  COMMENTS:       Untriggered XRF at high galactic latitude found  
  COMMENTS:       in data post-processing.  
  COMMENTS:       WXM error box is circular; not rectangular.  
  COMMENTS:       Burst_Validity flag is true.  
   

• GCN notice #1649
  T. Sakamoto, Y. Shirasaki, C. Graziani, M. Matsuoka, T. Tamagawa, K. Torii, A. Yoshida, E. Fenimore, M. Galassi, T. Tavenner, and T. Donaghy, on behalf of the HETE WXM Team;
  G. Ricker, J-L Atteia, N. Kawai, D. Lamb, and S. Woosley on behalf of the HETE Science Team;
  J. Villasenor, R. Vanderspek, J. Doty, G. Crew, G. Monnelly, N. Butler, T. Cline, J.G. Jernigan, A. Levine, F. Martel, E. Morgan, G. Prigozhin, 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;
  write:
  At 18:43:00.00 UTC (67380.00 s UT) on 21 Oct 2002, the HETE FREGATE and WXM instruments detected a faint, untriggered XRF.
  Ground analysis of the WXM data for the burst produced a location, which was reported in a GCN Notice at 10:58:44 UT on 22 Oct 2002, about 16 hours after the burst. The WXM localization SNR was 6. The WXM location can be expressed as a 90% confidence circle that is 20 arcminutes in radius and is centered at
  RA = 00h 17m 23s, Dec = -01d 37' 00" (J2000).
  In the WXM 2-25 keV band, the burst had a duration of ~13 seconds. The spectrum of the burst is soft, making estimates of its peak flux and fluence uncertain.
  A light curve for GRB021021 is provided at the following URL:
  http://space.mit.edu/HETE/Bursts/GRB021021.
  This message is citable.