TITLE: GCN CIRCULAR NUMBER: 8007 SUBJECT: GRB 080723, Swift-BAT refined analysis DATE: 08/07/23 18:48:45 GMT FROM: Hans Krimm at NASA-GSFC M. Stamatikos (GSFC/ORAU), S. D. Barthelmy (GSFC), W. Baumgartner (GSFC/UMBC), J. Cummings (GSFC/UMBC), E. Fenimore (LANL), N. Gehrels (GSFC), H. Krimm (GSFC/USRA), C. Markwardt (GSFC/UMD), K. McLean (GSFC/UMD), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), J. Tueller (GSFC), T. Ukwatta (GWU) (i.e. the Swift-BAT team): Using the data set from T-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 080723 (trigger #317662) (Stamatikos, et al., GCN Circ. 8000). The BAT ground-calculated position is RA, Dec = 274.461, -6.910 deg which is RA(J2000) = 18h 17m 50.6s Dec(J2000) = -06d 54' 34.8" with an uncertainty of 1.6 arcmin, (radius, sys+stat, 90% containment). The burst was in the fully coded part of the BAT field of view. The mask-weighted light curve showed a double-peaked structure, with the first peak extending from T-1 sec to T+4 sec, and the second smaller peak from T+6 sec to T+20 sec. T90 (15-350 keV) is 17.3 +- 3.0 sec (estimated error including systematics). The time-averaged spectrum from T-0.2 to T+18.7 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.77 +- 0.21. The fluence in the 15-150 keV band is 3.3 +- 0.4 x 10-7 erg/cm2. The 1-sec peak photon flux measured from T-0.13 sec in the 15-150 keV band is 0.9 +- 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/317662/BA/