TITLE: GCN CIRCULAR NUMBER: 14849 SUBJECT: GRB 130610A, Swift-BAT refined analysis DATE: 13/06/10 13:40:50 GMT FROM: Jay R. Cummings at NASA/GSFC/Swift C. B. Markwardt (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), 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 the recent telemetry downlink, we report further analysis of BAT GRB 130610A (trigger #557845) (Cummings, et al., GCN Circ. 14842). The BAT ground-calculated position is RA, Dec = 224.414, 28.187 deg which is RA(J2000) = 14h 57m 39.3s Dec(J2000) = +28d 11' 13.8" with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 96%. The mask-weighted light curve shows a single FRED peak. T90 (15-350 keV) is 46.4 +- 11.2 sec (estimated error including systematics). The time-averaged spectrum from T-7.04 to T+61.02 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.27 +- 0.08. The fluence in the 15-150 keV band is 2.5 +- 0.1 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+4.53 sec in the 15-150 keV band is 1.7 +- 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/557845/BA/