GRB080915B

This page lists all entries on GRB080915B in GRBweb

Summary IPN Swift GCN 8234 GCN 8236

Summary table
Variable Value Source
T0 15:53:35 UTC GCN_circulars,Swift Det
ra 213.0880° Swift
decl -11.4910° Swift
pos_error 7.77e-03° Swift
T90 3.9 s Swift
T90_start 15:53:35 UTC Swift
fluence 9.90e-07 erg/cm² Swift
T100 3.9 s
GBM_located False
mjd 54724.662210648145 GCN_circulars,Swift Det
IPN table
GRB_name GRB080915B
ra 213.0792°
decl -11.4667°
pos_error 5.00e-02°
Swift table
GRB_name GRB080915B
t_trigger 15:53:35 UTC
ra 213.0880°
decl -11.4910°
pos_error 7.77e-03°
T90 3.9 s
fluence 9.90e-07 erg/cm²
GCN 8234 table
GRB_name GRB080915B
GCN_number 8234
Detection_method Swift Det
t_trigger 15:53:35 UTC
ra 213.0780°
decl -11.4730°
Circular_text TITLE: GCN CIRCULAR NUMBER: 8234 SUBJECT: GRB 080915B: Swift detection of a burst DATE: 08/09/15 16:04:26 GMT FROM: David Palmer at LANL H. Ziaeepour (UCL-MSSL), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), C. Gronwall (PSU), S. T. Holland (CRESST/USRA/GSFC), J. A. Kennea (PSU), J. Mao (INAF-OAB), P. T. O'Brien (U Leicester), S. R. Oates (UCL-MSSL), J. P. Osborne (U Leicester), K. L. Page (U Leicester), D. M. Palmer (LANL), A. M. Parsons (GSFC), D. Perez (U Leicester), M. Perri (ASDC), T. Sakamoto (NASA/UMBC), R. L. C. Starling (U Leicester), G. Stratta (ASDC) and T. N. Ukwatta (GSFC/GWU) report on behalf of the Swift Team: At 15:53:35 UT, the Swift Burst Alert Telescope (BAT) triggered and located GRB 080915B (trigger=324805). The BAT on-board calculated location is RA, Dec 213.078, -11.473 which is RA(J2000) = 14h 12m 19s Dec(J2000) = -11d 28' 23" with an uncertainty of 3 arcmin (radius, 90% containment, including systematic uncertainty). The BAT light curve shows a single FRED peak structure with a duration of about 5 sec. The peak count rate was ~13,000 counts/sec (15-350 keV), at ~0 sec after the trigger. Due to the Solar observing constraint, Swift cannot slew to the BAT position until mid-December. There will thus be no XRT or UVOT data for this trigger. Burst Advocate for this burst is H. Ziaeepour (hz AT mssl.ucl.ac.uk). 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.)
GCN 8236 table
GRB_name GRB080915B
GCN_number 8236
Detection_method Swift-BAT Det
ra 213.0880°
decl -11.4910°
Circular_text TITLE: GCN CIRCULAR NUMBER: 8236 SUBJECT: GRB 080915B, Swift-BAT refined analysis DATE: 08/09/15 19:49:30 GMT FROM: Scott Barthelmy at NASA/GSFC K. McLean (GSFC/UMD), S. D. Barthelmy (GSFC), W. Baumgartner (GSFC/UMBC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. Ukwatta (GWU), H. Ziaeepour (UCL-MSSL) (i.e. the Swift-BAT team): Using the data set from T-28 to T+930 sec from the recent telemetry downlink, we report further analysis of BAT GRB 080915B (trigger #324805) (Ziaeepour, et al., GCN Circ. 8234). The BAT ground-calculated position is RA, Dec = 213.088, -11.491 deg, which is RA(J2000) = 14h 12m 21.2s Dec(J2000) = -11d 29' 26.9" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 74%. The mask-weighted light curve shows a roughly symmetric peak starting at ~T-0.5 sec, peaking at ~T+0.6 sec, and ending at ~T+4.5 sec. T90 (15-350 keV) is 3.9 +- 0.7 sec (estimated error including systematics). The time-averaged spectrum from T-0.5 to T+6.1 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 1.48 +- 0.35, and Epeak of 42.3 +- 9.1 keV (chi squared 54.5 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 9.9 +- 0.6 x 10^-7 erg/cm2 and the 1-sec peak flux measured from T+0.18 sec in the 15-150 keV band is 8.5 +- 0.3 ph/cm2/sec. A fit to a simple power law gives a photon index of 2.02 +- 0.08 (chi squared 62.6 for 57 d.o.f.). 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/324805/BA/