TITLE: GCN CIRCULAR NUMBER: 14658 SUBJECT: GRB 130515A: Swift-BAT refined analysis DATE: 13/05/15 11:57:33 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. Malesani (DARK/NBI), D. M. Palmer (LANL), T. Sakamoto (AGU), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-60 to T+243 sec from recent telemetry downlinks, we report further analysis of BAT GRB 130515A (trigger #555880) (Malesani, et al., GCN Circ. 14650). The BAT ground-calculated position is RA, Dec = 283.436, -54.283 deg, which is RA(J2000) = 18h 53m 44.6s Dec(J2000) = -54d 16' 57.3" with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 69%. The mask-weighted light curve shows two overlapping peaks starting at ~T+0.00, peaking at ~T+0.00 and ~T+0.30, and ending at ~T+0.40 sec. T90 (15-350 keV) is 0.29 +- 0.06 sec (estimated error including systematics). The time-averaged spectrum from T-0.04 to T+0.33 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 0.77 +- 0.18. The fluence in the 15-150 keV band is 1.5 +- 0.2 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-0.35 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 http://gcn.gsfc.nasa.gov/notices_s/555880/BA/