//////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10963 SUBJECT: GRB 100719A: Swift detection of a burst DATE: 10/07/19 03:47:15 GMT FROM: David Palmer at LANL R. Margutti (INAF-OAB), W. H. Baumgartner (GSFC/UMBC), J. M. Gelbord (PSU), E. A. Hoversten (PSU), J. Mao (INAF-OAB), C. B. Markwardt (CRESST/GSFC/UMD), D. M. Palmer (LANL), T. Sakamoto (NASA/UMBC), M. H. Siegel (PSU), T. N. Ukwatta (GSFC/GWU) and L. Vetere (PSU) report on behalf of the Swift Team: At 03:30:57 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 100719A (trigger=429357). Swift did not slew to the burst due to a sun observing constraint. The BAT on-board calculated location is RA, Dec 112.263, -5.837 which is RA(J2000) = 07h 29m 03s Dec(J2000) = -05d 50' 12" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve showed a single-peak structure with a duration of about 25 sec. The peak count rate was ~1500 counts/sec (15-350 keV), at ~0 sec after the trigger. The source will remain in Sun constraint until August 27, and therefore there will be no XRT or UVOT observations. Burst Advocate for this burst is R. Margutti (raffaella.margutti AT brera.inaf.it). Please contact the BA by email if you require additional information regarding Swift followup of this burst. In extremely urgent cases, after trying the Burst Advocate, you can contact the Swift PI by phone (see Swift TOO web site for information: http://www.swift.psu.edu/too.html.) //////////////////////////////////////////////////////////////////////// TITLE: GCN CIRCULAR NUMBER: 10964 SUBJECT: GRB 100719A: Swift-BAT refined analysis DATE: 10/07/19 14:49:02 GMT FROM: Scott Barthelmy at NASA/GSFC H. A. Krimm (GSFC/USRA), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), R. Margutti (INAF-OAB), C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team): Using the data set from T-61 to T+242 sec from recent telemetry downlinks, we report further analysis of BAT GRB 100719A (trigger #429357) (Margutti, et al., GCN Circ. 10963). The BAT ground-calculated position is RA, Dec = 112.319, -5.857 deg which is RA(J2000) = 07h 29m 16.6s Dec(J2000) = -05d 51' 24.4" with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 57%. The mask-weighted light curve shows a few overlapping peaks starting at ~T-5 sec, peaking at ~T+2 sec, and ending at ~T+80 sec. T90 (15-350 keV) is 36.0 +- 9.2 sec (estimated error including systematics). The time-averaged spectrum from T-3.9 to T+35.1 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.69 +- 0.25. The fluence in the 15-150 keV band is 5.3 +- 0.9 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+2.06 sec in the 15-150 keV band is 0.6 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level. The results of the batgrbproduct analysis are available at http://gcn.gsfc.nasa.gov/notices_s/429357/BA/