TITLE: GCN CIRCULAR NUMBER: 6623 SUBJECT: GRB 070714B, Swift-BAT refined analysis of the short hard burst DATE: 07/07/14 21:47:27 GMT FROM: Takanori Sakamoto at NASA/GSFC L. Barbier (GSFC), S. D. Barthelmy (GSFC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), J. Racusin (PSU), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/ISAS), M. Stamatikos (GSFC/ORAU), J. Tueller (GSFC), T. Ukwatta (GWU) (i.e. the Swift-BAT team): Using the data set from T-120 to T+182 sec from recent telemetry downlinks, we report further analysis of BAT GRB 070714B (trigger #284856) (Racusin, et al., GCN Circ. 6620). The BAT ground-calculated position is RA, Dec = 57.853, 28.294 deg which is RA(J2000) = 3h 51m 24.8s Dec(J2000) = 28d 17' 37" with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 93%. The BAT mask-weighted light curve shows multiple short spikes starting from T-0.8 sec with a duration of 3 sec. There is extended softer emission from T+20 sec to T+70 (and possibly T+100) sec. T90 (15-350 keV) is 64 +- 5 sec (estimated error including systematics). The light curve looks similar to previous short bursts such as GRB 050724 with a short-hard initial episode followed by a softer extended episode, so we think it is likely that this burst is in the short category. The time-averaged spectrum from T-0.8 to T+65.6 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.36 +- 0.19. The fluence in the 15-150 keV band is 7.2 +- 0.9 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T-0.39 sec in the 15-150 keV band is 2.7 +- 0.2 ph/cm2/sec. Separating out the initial "spike" of emission (from T-0.8 to T+2 sec), the photon index in a simple power-law fit is 0.99 +- 0.08. The fluence in the 15-150 keV band of this part is 5.1 +-0.3 x 10^-7 erg/cm2. All the quoted errors are at the 90% confidence level.