TITLE: GCN CIRCULAR NUMBER: 8397 SUBJECT: GRB 081022, Swift-BAT refined analysis DATE: 08/10/22 20:41:45 GMT FROM: Scott Barthelmy at NASA/GSFC T. N. Ukwatta (GWU) 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), C. B. Markwardt (GSFC/UMD), D. M. Palmer (LANL), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (GSFC/ORAU), G. Stratta (ASDC), J. Tueller (GSFC) (i.e. the Swift-BAT team): Using the data set from T-239 to T+903 sec from recent telemetry downlinks, we report further analysis of BAT GRB 081022 (trigger #332399) (Stratta, et al., GCN Circ. 8395). The BAT ground-calculated position is RA, Dec = 226.584, 12.409 deg which is RA(J2000) = 15h 06m 20.1s Dec(J2000) = +12d 24' 32.7" with an uncertainty of 1.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 64%. The mask-weighted light curve shows a long smooth peak starting at ~T-10 sec, peaking around T+50 sec, and ending around T+210 sec. T90 (15-350 keV) is 160 +- 40 sec (estimated error including systematics). The time-averaged spectrum from T-9.3 to T+207.3 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.67 +- 0.11. The fluence in the 15-150 keV band is 2.5 +- 0.2 x 10^-6 erg/cm2. The 1-sec peak photon flux measured from T+57.18 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/332399/BA/