TITLE: GCN CIRCULAR NUMBER: 38229 SUBJECT: GRB 241113A: Swift-BAT refined analysis DATE: 24/11/15 03:13:37 GMT FROM: Takanori Sakamoto at AGU tsakamoto@phys.aoyama.ac.jp
C. B. Markwardt (GSFC), S. D. Barthelmy (GSFC), R. Gupta (GSFC), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), M. J. Moss (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC), D. Sadaula (GSFC/UMBC), T. Sakamoto (AGU), M. H. Siegel (PSU) (i.e. the Swift-BAT team):
Using the data set from T-239 to T+329 sec from the recent telemetry downlink, we report further analysis of BAT GRB 241113A (trigger #1267501) (Siegel, et al., GCN Circ. 38194). The BAT ground-calculated position is RA, Dec = 16.578, -22.658 deg which is RA(J2000) = 01h 06m 18.7s Dec(J2000) = -22d 39' 27.8" with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 93%.
The mask-weighted light curve shows a single-pulse structure that starts at T0, peaks at T+0.5 sec, and ends at T+2 sec. There is a hint of the emission between T+35 sec and T+80 sec. T90 (15-350 keV) is 1.7 +- 0.4 sec (estimated error including systematics).
The time-averaged spectrum from T+0.01 to T+2.06 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.76 +- 0.23. The fluence in the 15-150 keV band is 1.3 +- 0.2 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-0.00 sec in the 15-150 keV band is 1.4 +- 0.2 ph/cm2/sec. All the quoted errors are at the 90% confidence level.
The results of the batgrbproduct analysis are available at https://swift.gsfc.nasa.gov/results/batgrbcat/BAT_refined_circular/1267501
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