TITLE: GCN CIRCULAR NUMBER: 15116 SUBJECT: GRB 130822A, Swift-BAT refined analysis DATE: 13/08/23 01:23:49 GMT FROM: Jay R. Cummings at NASA/GSFC/Swift T. N. Ukwatta (MSU), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), D. Kocevski (NASA/GSFC/ORAU), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/GSFC/ORAU), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), (i.e. the Swift-BAT team): Using the data set from T-60 to T+123 sec from the recent telemetry downlink, we report further analysis of BAT GRB 130822A (trigger #567163) (Kocevski, et al., GCN Circ. 15112). The BAT ground-calculated position is RA, Dec = 27.931, -3.193 deg which is RA(J2000) = 01h 51m 43.4s Dec(J2000) = -03d 11' 34.0" with an uncertainty of 2.5 arcmin, (radius, sys+stat, 90% containment). The partial coding was 92%. The mask-weighted light curve shows a single peak. T90 (15-350 keV) is 0.04 +- 0.01 sec (estimated error including systematics). The time-averaged spectrum from T-0.004 to T+0.044 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.64 +- 0.29. The fluence in the 15-150 keV band is 1.3 +- 0.3 x 10^-08 erg/cm2. The 1-sec peak photon flux measured from T-0.48 sec in the 15-150 keV band is 0.3 +- 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/567163/BA/