TITLE: GCN CIRCULAR NUMBER: 11677 SUBJECT: GRB 110208A: Swift-BAT refined analysis DATE: 11/02/09 04:22:41 GMT FROM: Scott Barthelmy at NASA/GSFC T. Sakamoto (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), V. D'Elia (ASDC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team): Using the data set from T-240 to T+962 sec from recent telemetry downlinks, we report further analysis of BAT GRB 110208A (trigger #445038) (D'Ella, et al., GCN Circ. 11674). The BAT ground-calculated position is RA, Dec = 22.487, -20.561 deg, which is RA(J2000) = 01h 29m 56.9s Dec(J2000) = -20d 33' 40.5" with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. The mask-weighted light curve shows a single peak starting at ~T-2 sec, peaking at ~T+0.5 sec, and ending at ~T+20 sec. T90 (15-350 keV) is 37.4 +- 7.9 sec (estimated error including systematics). The time-averaged spectrum from T-1.5 to T+40.7 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.08 +- 0.31. The fluence in the 15-150 keV band is 2.7 +- 0.6 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+0.46 sec in the 15-150 keV band is 0.6 +- 0.1 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/445038/BA/