GRB 200306***A***, Swift-BAT refined analysis S. D. Barthelmy (GSFC), J. R. Cummings (CPI), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (GSFC/UMBC), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Sakamoto (AGU), M. Stamatikos (OSU), T. N. Ukwatta (LANL) (i.e. the Swift-BAT team): Using the data set from T-240 to T+1065 sec from the recent telemetry downlink, we report further analysis of BAT GRB 200306***A*** (trigger #960102) (NAME, et al., GCN Circ. xxxx). The BAT ground-calculated position is RA, Dec = 198.578, 11.263 deg which is RA(J2000) = 13h 14m 18.7s Dec(J2000) = +11d 15' 47.4" with an uncertainty of 1.3 arcmin, (radius, sys+stat, 90% containment). The partial coding was 42%. [Description about the mask-weighted light curve] T90 (15-350 keV) is 53.2 +- 13.7 sec (estimated error including systematics). The time-averaged spectrum from T-12.1 to T+48.0 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 0.83 +- 0.12. The fluence in the 15-150 keV band is 2.8 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T+3.57 sec in the 15-150 keV band is 1.2 +- 0.3 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/960102/BA/