TITLE: GCN CIRCULAR NUMBER: 7604 SUBJECT: GRB 080413A, Swift-BAT refined analysis DATE: 08/04/13 15:58:16 GMT FROM: Scott Barthelmy at NASA/GSFC J. Tueller (GSFC), S. D. Barthelmy (GSFC), W. Baumgartner (GSFC/UMBC), A. P. Beardmore (U Leicester), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), D. Palmer (LANL), T. Sakamoto (GSFC/UMBC), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), T. Ukwatta (GWU) (i.e. the Swift-BAT team): Using the data set from T-239 to T+454 sec from recent telemetry downlinks, we report further analysis of BAT GRB 080413A (trigger #309096) (Beardmore, et al., GCN Circ. 7594). The BAT ground-calculated position is RA, Dec = 287.301, -27.677 deg, which is RA(J2000) = 19h 09m 12.1s Dec(J2000) = -27d 40' 36.8" with an uncertainty of 1.0 arcmin, (radius, sys+stat, 90% containment). The partial coding was 81%. The mask-weighted light curve shows four peaks. The first starting at T-0.1 sec, peaking at T+2.0 sec. The second peak overlaps with the first and peaks at ~T+7 sec. The third and fourth peaks are well separated with peaks at T+16 and T+47 sec, repsectively. The lightcurve returns to baseline at ~T+80 sec. T90 (15-350 keV) is 46 +- 1 sec (estimated error including systematics). The time-averaged spectrum from T-0.1 to T+50.3 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.57 +- 0.06. The fluence in the 15-150 keV band is 3.5 +- 0.1 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+1.64 sec in the 15-150 keV band is 5.6 +- 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/309096/BA/