TITLE: GCN CIRCULAR NUMBER: 11557 SUBJECT: GRB 110112A: Swift-BAT refined analysis DATE: 11/01/12 16:32:56 GMT FROM: Scott Barthelmy at NASA/GSFC S. D. Barthelmy (GSFC), T. Sakamoto (GSFC/UMBC), M. Stamatikos (OSU) (on behalf of 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 short GRB 110112A (trigger #442039) (Stamatikos, et al., GCN Circ. 11553). The BAT ground-calculated position is RA, Dec = 329.936, 26.470 deg, which is RA(J2000) = 21h 59m 44.6s Dec(J2000) = +26d 28' 10.6" with an uncertainty of 2.6 arcmin, (radius, sys+stat, 90% containment). The partial coding was 87%. The mask-weighted light curve shows a single spike starting at ~T-0.1 sec and ending at ~T+0.5 sec. T90 (15-350 keV) is 0.5 +- 0.1 sec (estimated error including systematics). The time-averaged spectrum from T-0.1 to T+0.5 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.14 +- 0.46. The fluence in the 15-150 keV band is 3.0 +- 0.9 x 10^-8 erg/cm2. The 1-sec peak photon flux measured from T-0.28 sec in the 15-150 keV band is 0.5 +- 0.2 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/442039/BA/