TITLE: GCN GRB OBSERVATION REPORT NUMBER: 5459 SUBJECT: GRB 060814: Refined analysis of the Swift-BAT burst DATE: 06/08/15 22:36:55 GMT FROM: Scott Barthelmy at NASA/GSFC M. Stamatikos (GSFC/ORAU), L. Barbier (GSFC), S. D. Barthelmy (GSFC), J. Cummings (GSFC/ORAU), E. Fenimore (LANL), N. Gehrels (GSFC), D. Hullinger (BYU-Idaho), H. Krimm (GSFC/USRA), M. Koss (GSFC/UMD), C. Markwardt (GSFC/UMD), A. Moretti (INAF-OAB), D. Palmer (LANL), A. Parsons (GSFC), T. Sakamoto (GSFC/ORAU), G. Sato (GSFC/ISAS), J. Tueller (GSFC) on behalf of the Swift-BAT team: Using the data set from T-239 to T+963 sec from recent telemetry downlinks, we report further analysis of BAT GRB 060814 (trigger #224552) (Moretti, et al., GCN Circ. 5447). The BAT ground-calculated position is RA,Dec = 221.336, 20.593 deg {14h 45m 20.6s, 20d 35' 36.3"} (J2000) +- 0.7 arcmin, (radius, sys+stat, 90% containment). The partial coding was 64%. There are four main peaks. The first starts at ~T-10 sec and blends into the second peak which peaks at T+16 and ends around T+40 sec. The second peak is the brightest. The third peak starts roughly T+50, peaks at ~T+70 and ends at ~T+110 sec. It is half as bright as the second peak. The fourth and much smaller peak is about 40 sec wide and peaks at T+130 sec. T90 (15-350 keV) is 146 +- 10 sec (estimated error including systematics). The time-averaged spectrum from T-9.4 to T+224 is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.56 +- 0.03. The fluence in the 15-150 keV band is 1.50 +- 0.02 x 10^-5 erg/cm2. The 1-sec peak photon flux measured from T+15.40 sec in the 15-150 keV band is 7.4 +- 0.3 ph/cm2/sec. All the quoted errors are at the 90% confidence level.