Gamma-ray Burst 021204

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:          GCN/HETE BURST POSITION NOTICE                              
  NOTICE_DATE:    Wed 04 Dec 02 13:14:52 UT 
  NOTICE_TYPE:    HETE S/C_Alert 
  TRIGGER_NUM:    2486,   Seq_Num: 1
  GRB_DATE:       12612 TJD;   338 DOY;   02/12/04                                
  GRB_TIME:       47686.11 SOD {13:14:46.11} UT 
  TRIGGER_SOURCE: Trigger on the 25-400 keV band.
  GAMMA_RATE:     133  [cnts/s]  on a 1.300 [sec] timescale
  SC_LONG:         86 [deg East]               
  SUN_POSTN:      250.73d {+16h 42m 55s}  -22.26d {-22d 15' 22"}
  MOON_POSTN:     254.05d {+16h 56m 13s}  -23.30d {-23d 18' 02"}
  MOON_ILLUM:     0 [%]
  COMMENTS:       No s/c ACS pointing info available yet.        
  COMMENTS:       Probable GRB.
  
  

• GCN/BACODINE POSITION NOTICE
  

   
  TITLE:          GCN/HETE BURST POSITION NOTICE                              
  NOTICE_DATE:    Wed 04 Dec 02 15:10:29 UT 
  NOTICE_TYPE:    HETE Ground Analysis
  TRIGGER_NUM:    2486,   Seq_Num: 3
  GRB_DATE:       12612 TJD;   338 DOY;   02/12/04                                
  GRB_TIME:       47686.11 SOD {13:14:46.11} UT 
  TRIGGER_SOURCE: Trigger on the 25-400 keV band.
  GAMMA_RATE:     133  [cnts/s]  on a 1.300 [sec] timescale
  SC_-Z_RA:        70 [deg]
  SC_-Z_DEC:       20 [deg]
  SC_LONG:         86 [deg East] 
  WXM_CNTR_RA:     95.138d {+06h 20m 33s} (J2000),
                   95.186d {+06h 20m 45s} (current),             
                   94.323d {+06h 17m 18s} (1950)
  WXM_CNTR_DEC:   +32.104d {+32d 06' 13"} (J2000),
                  +32.102d {+32d 06' 07"} (current),
                  +32.126d {+32d 07' 35"} (1950)         
  WXM_CORNER1:     95.0190  31.6460 [deg]
  WXM_CORNER2:     94.8420  32.5170 [deg]
  WXM_CORNER3:     95.2590  32.5600 [deg]
  WXM_CORNER4:     95.4320  31.6910 [deg]                                     
  WXM_MAX_SIZE:   57.92 [arcmin] diameter   
  WXM_LOC_SN:     2 sig/noise (pt src in image)
  WXM_IMAGE_SN:   X= 1.9 Y= 1.8 [sig/noise]
  WXM_LC_SN:      X= 6.6 Y= 3.8 [sig/noise]                                       
  SUN_POSTN:      250.73d {+16h 42m 55s}  -22.26d {-22d 15' 22"}
  SUN_DIST:       156.20 [deg]
  MOON_POSTN:     254.05d {+16h 56m 13s}  -23.30d {-23d 18' 02"}
  MOON_DIST:      159.37 [deg]
  MOON_ILLUM:     0 [%]    
  GAL_COORDS:     180.91,8.11 [deg] galactic lon,lat of the burst
  ECL_COORDS:     94.40,8.74 [deg] ecliptic lon,lat of the burst
  COMMENTS:       Definite GRB.
  COMMENTS:       Burst_Validity flag is true.  
  COMMENTS:       WXM data refined since S/C_Last Notice.
   
  

• GCN notice #1730
  K. Torii (RIKEN), H. Yamaoka (Kyushu U.), and T. Kato (Kyoto U.) report:
  Starting at 15:21:26 UT on December 4th, the central 53x53 arcmin of the error region of GRB 021204 (HETE trigger 2486; GRB time 13:14:46.11 UT) was observed at RIKEN with 0.2-m f/4 reflector equipped with unfiltered CCD AP7p.
  Visual comparison of the first frame (30-s integration) with DSS does not show a new object brighter than ~16.5 (USNO-A2.0 red magnitude).
• GCN notice #1735
  M. Nysewander, D. Reichart (U. North Carolina) and M. Schwartz (Tenagra Observatories) report:
  We imaged 100% of the error box of GRB 021204 with the 32-inch Tenagra II telescope beginning at 07:58:37 UT on Dec 5 and 08:07:35 UT on Dec 6, 0.7 and 1.7 days after the burst. For both epochs we integrated in the Ic band for 600s in eight pointings. We note that the Galactic extinction along this line of sight is approximately A_Ic = 0.9 mag (Schlegel et al. 1998).
  Using the image subtraction software ISIS2 (Alard 2000), we find no transient to the limiting magnitude of our first epoch images, which we estimate to be Ic = 21.3 (3 sigma) using 5 USNO-A2.0 stars.

  Alard, C., 2000, A&AS 114, 363
  Schlegel, D., et al. 1998, ApJ, 500, 525
  

• GCN notice #1747
  M. Ishiguro, Y. Sarugaku, H. Nonaka, S. M. Kwon (ISAS) S. Nishiura, H. Mito, and Y. Urata on behalf of the Kiso GRB team:
  " We observed the central 50 x 50 arcmin of the error region of GRB 021204 (HETE trigger 2486; GRB time 13:14:46.11 UT) with the 105-cm Schmidt telescope at the Kiso observatory, the University of Tokyo. Starting at 2002 December 4.812 UT, 300-s exposures were made in B, V, R, I band. Comparison with the DPOSS image did not show an optical afterglow candidate brighter than 18.7R mag."
  This message may be cited.