TITLE: GCN CIRCULAR NUMBER: 14899 SUBJECT: GRB 130615A: Swift-BAT refined analysis DATE: 13/06/15 15:56:13 GMT FROM: Scott Barthelmy at NASA/GSFC S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), E. Sonbas (NASA/GSFC/Adiyaman Univ.), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-239 to T+963 sec from recent telemetry downlinks, we report further analysis of BAT GRB 130615A (trigger #558271) (Sonbas, et al., GCN Circ. 14897). The BAT ground-calculated position is RA, Dec = 274.963, -68.161 deg, which is RA(J2000) = 18h 19m 51.2s Dec(J2000) = -68d 09' 39.7" with an uncertainty of 2.9 arcmin, (radius, sys+stat, 90% containment). The partial coding was 60%. The mask-weighted light curve shows two peaks both of which are nearly smooth. The first starts at ~T+10 sec and ends at ~T+150 se. The second peak goes from ~T+270 to T+450 sec. T90 (15-350 keV) is 304 +- 30 sec (estimated error including systematics). The time-averaged spectrum from T+25.57 to T+386.86 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 0.87 +- 0.92, and Epeak of 33.2 +- 8.6 keV (chi squared 61.91 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 2.1 +- 0.3 x 10^-6 erg/cm2 and the 1-sec peak flux measured from T+31.84 sec in the 15-150 keV band is 0.7 +- 0.2 ph/cm2/sec. A fit to a simple power law gives a photon index of 2.18 +- 0.16 (chi squared 70.23 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/558271/BA/