Gamma-ray Burst 050507

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sat 07 May 05 22:44:14 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     118248,   Seg_Num: 0
  GRB_RA:           48.055d {+03h 12m 13s} (J2000),
                    48.120d {+03h 12m 29s} (current),
                    47.456d {+03h 09m 49s} (1950)
  GRB_DEC:         -11.073d {-11d 04' 23"} (J2000),
                   -11.054d {-11d 03' 12"} (current),
                   -11.261d {-11d 15' 37"} (1950)
  GRB_ERROR:       4.00 [arcmin radius, statistical only]
  GRB_INTEN:       33701 [cnts]    Peak=606 [cnts/sec]
  TRIGGER_DUR:     8.192 [sec]
  TRIGGER_INDEX:   336     E_range: 25-100 keV
  BKG_INTEN:       248359 [cnts]
  BKG_TIME:        81704.00 SOD {22:41:44.00} UT
  BKG_DUR:         64 [sec]
  GRB_DATE:        13497 TJD;   127 DOY;   05/05/07
  GRB_TIME:        81798.31 SOD {22:43:18.31} UT
  GRB_PHI:         -60.72 [deg]
  GRB_THETA:        25.91 [deg]
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     8.06 [sigma]
  IMAGE_SIGNIF:    9.00 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +4  +2  +0 -101  +0 -88  +1 
  SUN_POSTN:        44.99d {+02h 59m 59s}  +17.04d {+17d 02' 31"}
  SUN_DIST:         28.26 [deg]
  MOON_POSTN:       39.29d {+02h 37m 11s}  +17.32d {+17d 19' 05"}
  MOON_DIST:        29.68 [deg]
  MOON_ILLUM:      0 [%]
  GAL_COORDS:      193.93,-53.26 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:       42.13,-27.81 [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/SWIFT NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Sat 07 May 05 22:46:34 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     118248,   Seg_Num: 0
  GRB_RA:           48.055d {+03h 12m 13s} (J2000),
                    48.120d {+03h 12m 29s} (current),
                    47.456d {+03h 09m 49s} (1950)
  GRB_DEC:         -11.073d {-11d 04' 23"} (J2000),
                   -11.054d {-11d 03' 12"} (current),
                   -11.261d {-11d 15' 37"} (1950)
  GRB_DATE:        13497 TJD;   127 DOY;   05/05/07
  GRB_TIME:        81798.31 SOD {22:43:18.31} UT
  TRIGGER_INDEX:   336
  GRB_PHI:         -60.72 [deg]
  GRB_THETA:        25.91 [deg]
  DELTA_TIME:      58.00 [sec]
  LC_URL:          sw00118248000msb.lc
  SUN_POSTN:        44.99d {+02h 59m 59s}  +17.04d {+17d 02' 31"}
  SUN_DIST:         28.26 [deg]
  MOON_POSTN:       39.29d {+02h 37m 11s}  +17.32d {+17d 19' 05"}
  MOON_DIST:        29.68 [deg]
  MOON_ILLUM:      0 [%]
  GAL_COORDS:      193.93,-53.26 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:       42.13,-27.81 [deg] ecliptic lon,lat of the pointing direction
  COMMENTS:        SWIFT-BAT GRB Lightcurve.  
  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:           
  COMMENTS:        The next comments were copied from the BAT_POS Notice:  
  COMMENTS:        This is a GRB.  
  

  
• GCN notice #3378
  A. Levan (Leicester), L Barbier (GSFC), A. Blustin (MSSL), C. Markwardt (GSFC), D. Palmer (LANL) on behalf of the Swift team.
  At 22:43:18 UT, the Swift Burst Alert Telescope (BAT) triggered and located on-board GRB050507 (trigger #118248). The BAT on-board calculated location is RA, dec 48.055,-11.073 (J2000) with an uncertainty of 4 arcmin (radius, 3-sigma, including estimated systematic uncertainty). The BAT light curve showed a spikey burst structure with a duration of about 20 seconds. The peak count rate measured by BAT was about 800 counts/sec in the 15 - 350 keV band.
  Because this burst is only 28 degrees from the sun, the spacecraft will not slew to this burst.