Gamma-ray Burst 051113

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 13 Nov 05 15:22:48 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     163765,   Seg_Num: 0
  GRB_RA:          187.222d {+12h 28m 53s} (J2000),
                   187.299d {+12h 29m 12s} (current),
                   186.565d {+12h 26m 16s} (1950)
  GRB_DEC:         -26.391d {-26d 23' 25"} (J2000),
                   -26.423d {-26d 25' 22"} (current),
                   -26.114d {-26d 06' 50"} (1950)
  GRB_ERROR:       3.00 [arcmin radius, statistical only]
  GRB_INTEN:       4531 [cnts]    Image_Peak=161 [image_cnts]
  TRIGGER_DUR:     1.024 [sec] 
  TRIGGER_INDEX:   148     E_range: 25-100 keV
  BKG_INTEN:       29520 [cnts]
  BKG_TIME:        55336.00 SOD {15:22:16.00} UT
  BKG_DUR:         8 [sec]
  GRB_DATE:        13687 TJD;   317 DOY;   05/11/13
  GRB_TIME:        55354.72 SOD {15:22:34.72} UT
  GRB_PHI:         -48.70 [deg]
  GRB_THETA:        42.22 [deg]
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     13.71 [sigma]
  IMAGE_SIGNIF:    7.43 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +0  +2  +3 -100  +0 -77  +1 
  SUN_POSTN:       228.92d {+15h 15m 41s}  -18.10d {-18d 05' 52"}
  SUN_DIST:         39.24 [deg]
  MOON_POSTN:       19.12d {+01h 16m 28s}   +8.94d {+08d 56' 30"}
  MOON_DIST:       159.24 [deg]
  MOON_ILLUM:      93 [%]
  GAL_COORDS:      296.67, 36.21 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      197.50,-21.29 [deg] ecliptic lon,lat of the burst (or transient)
  COMMENTS:        SWIFT-BAT GRB Coordinates.  
  COMMENTS:        This is a rate trigger.  
  COMMENTS:        A point_source was found.  
  COMMENTS:        This does not match any source in the on-board catalog.  
  COMMENTS:        This does not match any source in the ground catalog.  
  COMMENTS:        This is a GRB.  
  

• red DSS finding chart ps-file
  
  
• GCN NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sun 13 Nov 05 15:26:22 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     163765,   Seg_Num: 0
  GRB_RA:          187.222d {+12h 28m 53s} (J2000),
                   187.299d {+12h 29m 12s} (current),
                   186.565d {+12h 26m 16s} (1950)
  GRB_DEC:         -26.391d {-26d 23' 25"} (J2000),
                   -26.423d {-26d 25' 22"} (current),
                   -26.114d {-26d 06' 50"} (1950)
  GRB_DATE:        13687 TJD;   317 DOY;   05/11/13
  GRB_TIME:        55354.72 SOD {15:22:34.72} UT
  TRIGGER_INDEX:   148
  GRB_PHI:         -48.70 [deg]
  GRB_THETA:        42.22 [deg]
  DELTA_TIME:      64.00 [sec]
  TRIGGER_DUR:     1.024 [sec] 
  LC_URL:          sw00163765000msb.lc
  SUN_POSTN:       228.92d {+15h 15m 41s}  -18.10d {-18d 05' 52"}
  SUN_DIST:         39.24 [deg]
  MOON_POSTN:       19.12d {+01h 16m 28s}   +8.94d {+08d 56' 30"}
  MOON_DIST:       159.24 [deg]
  MOON_ILLUM:      93 [%]
  GAL_COORDS:      296.67, 36.21 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      197.50,-21.29 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-BAT GRB Lightcurve.  
  COMMENTS:           
  COMMENTS:        The next comments were copied from the BAT_POS Notice:  
  COMMENTS:        This is a rate trigger.  
  COMMENTS:        A point_source was found.  
  COMMENTS:        This does not match any source in the on-board catalog.  
  COMMENTS:        This does not match any source in the ground catalog.  
  COMMENTS:        This is a GRB.  
  

  
• GCN Circular #4268
  S.T. Holland (GSFC/USRA), L. Barbier (GSFC), S. Barthelmy (GSFC), N. Gehrels (GSFC), S. Hunsberger (PSU), D. Palmer (LANL) on behalf of the Swift team:
  At 15:22:35 UT, Swift-BAT triggered and located GRB 051113 (trigger=163765). The spacecraft did not slew to this burst because of the Sun-angle observing constraint; this burst is 39 deg from the Sun. The BAT on-board calculated location is RA,Dec 187.222d,-26.391d {12h 28m 53s,-26d 23' 25"} (J2000), with an uncertainty of 3 arcmin (radius, 90% containment, stat+sys). The BAT light curve shows a single peak with a total duration of ~10 sec. The peak count rate was ~1400 counts/sec (15-350 keV), at ~2 seconds after the trigger.
• GCN Circular #4269
  C. Markwardt (GSFC/UMD), L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (UMD), H. Krimm (GSFC/USRA), T. Mitani (ISAS), J. Nousek (PSU), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/NRC), G. Sato (ISAS), M. Suzuki (Saitama), M. Tripicco (GSFC-SSAI), J. Tueller (GSFC), on behalf of the Swift/BAT team:
  At 15:22:35 UT Swift-BAT detected GRB 051113 (trigger=163765) (GCN Circ 4268, Holland et al.). The refined BAT ground position is (RA,Dec) = 187.267, -26.387, [deg; J2000] {12h 29m 4.2s, -26d 23' 14"} +- 2 arcmin, (95% containment). The partial coding was 25%.
  The light curve shows multiple peaks at T-30 seconds, T, T+50 seconds, and T+70 seconds. T90 (15-350 keV) is (94 +- 1) seconds (estimated error including systematics).
  The photon index of the time-averaged spectrum is 1.70 +- 0.14. The fluence in the 15-150 keV band is (2.6 +- 0.2) x 10^-6 erg/cm2. The 1-s peak photon flux measured from T+ 1 second in the 15-350 band is (2.4 +- 0.3) ph/cm2/sec. All the quoted errors are at the 90% confidence level.