Gamma-ray Burst 050715

(All information courtesy of the instrument teams.)

Previous IAU Circulars

• none

• GCN/BACODINE POSITION NOTICE
  

  TITLE:           GCN/SWIFT NOTICE
  NOTICE_DATE:     Fri 15 Jul 05 22:31:04 UT
  NOTICE_TYPE:     Swift-BAT GRB Position
  TRIGGER_NUM:     146129,   Seg_Num: 0
  GRB_RA:          155.669d {+10h 22m 41s} (J2000),
                   155.740d {+10h 22m 58s} (current),
                   155.029d {+10h 20m 07s} (1950)
  GRB_DEC:          -0.059d {-00d 03' 31"} (J2000),
                    -0.087d {-00d 05' 13"} (current),
                    +0.194d {+00d 11' 39"} (1950)
  GRB_ERROR:       4.00 [arcmin radius, statistical only]
  GRB_INTEN:       20088 [cnts]    Image_Peak=446 [image_cnts]
  TRIGGER_DUR:     4.096 [sec]
  TRIGGER_INDEX:   298     E_range: 25-100 keV
  BKG_INTEN:       173448 [cnts]
  BKG_TIME:        80968.00 SOD {22:29:28.00} UT
  BKG_DUR:         40 [sec]
  GRB_DATE:        13566 TJD;   196 DOY;   05/07/15
  GRB_TIME:        81026.42 SOD {22:30:26.42} UT
  GRB_PHI:         -76.48 [deg]
  GRB_THETA:        20.75 [deg]
  SOLN_STATUS:     0x3
  RATE_SIGNIF:     11.83 [sigma]
  IMAGE_SIGNIF:    9.08 [sigma]
  MERIT_PARAMS:     +1  +0  +0  +2  +2  +2 -100  +0 -71  +1 
  SUN_POSTN:       115.37d {+07h 41m 30s}  +21.39d {+21d 23' 26"}
  SUN_DIST:         44.86 [deg]
  MOON_POSTN:      215.91d {+14h 23m 38s}  -16.32d {-16d 18' 55"}
  MOON_DIST:        61.45 [deg]
  MOON_ILLUM:      63 [%]
  GAL_COORDS:      244.00, 45.12 [deg] galactic lon,lat of the burst (or transient)
  ECL_COORDS:      157.49, -9.49 [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:     Fri 15 Jul 05 22:34:06 UT
  NOTICE_TYPE:     Swift-BAT GRB Lightcurve
  TRIGGER_NUM:     146129,   Seg_Num: 0
  GRB_RA:          155.669d {+10h 22m 41s} (J2000),
                   155.740d {+10h 22m 58s} (current),
                   155.029d {+10h 20m 07s} (1950)
  GRB_DEC:          -0.059d {-00d 03' 31"} (J2000),
                    -0.087d {-00d 05' 13"} (current),
                    +0.194d {+00d 11' 39"} (1950)
  GRB_DATE:        13566 TJD;   196 DOY;   05/07/15
  GRB_TIME:        81026.42 SOD {22:30:26.42} UT
  TRIGGER_INDEX:   298
  GRB_PHI:         -76.48 [deg]
  GRB_THETA:        20.75 [deg]
  DELTA_TIME:      65491.00 [sec]
  LC_URL:          sw00146129000msb.lc
  SUN_POSTN:       115.37d {+07h 41m 30s}  +21.39d {+21d 23' 26"}
  SUN_DIST:         44.86 [deg]
  MOON_POSTN:      215.91d {+14h 23m 38s}  -16.32d {-16d 18' 55"}
  MOON_DIST:        61.45 [deg]
  MOON_ILLUM:      63 [%]
  GAL_COORDS:      244.00, 45.12 [deg] galactic lon,lat of the pointing direction
  ECL_COORDS:      157.49, -9.49 [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 notice #3621
  J. Greiner (MPE), S. Barthelmy (GSFC), H. Krimm (GSFC/USRA), D. Palmer (LANL), A. Parsons (GSFC), on behalf of the Swift-BAT team:
  At 22:30:26.42 UT, the Swift-BAT instrument triggered (trigger=146129) on GRB 050715. The spacecraft did not slew to this new burst because of the Sun observing constraint (and it will remain in constraint for 2-3 months). The BAT flight-determined location is RA,Dec 155.669,-0.059 {+10h 22m 41s, -00d 03' 31"} (J2000) with a 3 armin uncertainty (radius, 90% containment, stat+sys). The lightcurve has two main peaks separated by ~35 sec with a total duration of ~70 sec. There is some evidence of 1 or 2 more smaller peaks. The peak count rate is ~1400 cnts/sec in the 15-350 keV band.
• GCN notice #3622
  L. Barbier (GSFC), S. Barthelmy (GSFC), J. Cummings (GSFC/NRC), E. Fenimore (LANL), N. Gehrels (GSFC), J. Greiner (MPE), D. Hullinger (GSFC/UMD), K. Hurley (Berkeley), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), J. Norris (GSFC), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/NRC), J. Tueller (GSFC) on behalf of the Swift-BAT team:
  Using the full data set from the recent telemetry downlink, we report further analysis of Swift-BAT Trigger #146129 (Greiner, et al., GCN 3621). The ground-analysis position is RA,Dec 155.645,-0.040 (J2000) with an uncertainty of 3 arcmin (radius, 90%, stat+sys). T90 is 52 +- 2 sec. Fitting a simple power law over the full interval from T-10 to T+54 seconds, the photon index is 1.6 +/- 0.1 with a fluence of 2.5 +/- 0.26 X 10^-6 erg/cm^2 in the 15-350 keV band (90% c.l.). The peak flux in a 1-sec wide window starting at T+40.4 seconds is 1.24 +/- 0.17 ph/cm^2/sec (15-350 keV).