TITLE: GCN CIRCULAR NUMBER: 16423 SUBJECT: GRB 140619A: Swift-BAT refined analysis DATE: 14/06/20 12:24:35 GMT FROM: Amy Lien at GSFC D. M. Palmer (LANL), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), J. R. Cummings (GSFC/UMBC), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), A. Y. Lien (NASA/UMBC), C. B. Markwardt (GSFC), M. De Pasquale (INAF-IASFPA) T. Sakamoto (AGU), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (MSU) (i.e. the Swift-BAT team): Using the data set from T-239 to T+421 sec from the recent telemetry downlink, we report further analysis of BAT GRB 140619A (trigger #602080) (De Pasquale, et al., GCN Circ. 16415). The BAT ground-calculated position is RA, Dec = 27.096, -39.249 deg which is RA(J2000) = 01h 48m 23.2s Dec(J2000) = -39d 14' 57.1" with an uncertainty of 1.8 arcmin, (radius, sys+stat, 90% containment). The partial coding was 41%. The mask-weighted light curve shows a complex structure with multiple peaks. The main visible structure starts with roughly two long weaker pulses from ~T+20 s to T+150 s. The two weak pulses were followed by the major bright structure lasting until ~T+260 s, and it consists of many sub-pulses. Afterward there is another weaker long pulse lasting until ~T+350 s. T90 (15-350 keV) is 233.9 +- 13.4 sec (estimated error including systematics). Note that the main structure of the burst happened at ~150 s after the original image trigger, and was not described in the first circular (De Pasquale, et al., GCN Circ. 16415). The time-averaged spectrum from T+32.3 to T+340.4 sec is best fit by a power law with an exponential cutoff. This fit gives a photon index 1.45 +- 0.14, and Epeak of 117.8 +- 46.2 keV (chi squared 54.23 for 56 d.o.f.). For this model the total fluence in the 15-150 keV band is 2.1 +- 0.04 x 10^-5 erg/cm2 and the 1-sec peak flux measured from T+219.52 sec in the 15-150 keV band is 4.6 +- 0.2 ph/cm2/sec. A fit to a simple power law gives a photon index of 1.71 +- 0.03 (chi squared 64.34 for 57 d.o.f.). 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/602080/BA/