TITLE: GCN CIRCULAR NUMBER: 11453 SUBJECT: GRB 101213A, Swift-BAT refined analysis DATE: 10/12/13 21:59:32 GMT FROM: Takanori Sakamoto at NASA/GSFC J. R. Cummings (GSFC/UMBC), S. D. Barthelmy (GSFC), W. H. Baumgartner (GSFC/UMBC), E. E. Fenimore (LANL), N. Gehrels (GSFC), H. A. Krimm (GSFC/USRA), C. B. Markwardt (GSFC), D. M. Palmer (LANL), A. M. Parsons (GSFC), T. Sakamoto (GSFC/UMBC), G. Sato (ISAS), M. Stamatikos (OSU), J. Tueller (GSFC), T. N. Ukwatta (GWU) (i.e. the Swift-BAT team): Using the data set from T-240 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT GRB 101213A (trigger #440285) (Sakamoto, et al., GCN Circ. 11448). The BAT ground-calculated position is RA, Dec = 241.297, 21.905 deg which is RA(J2000) = 16h 05m 11.3s Dec(J2000) = +21d 54' 17.6" with an uncertainty of 1.1 arcmin, (radius, sys+stat, 90% containment). The partial coding was 31%. The mask-weighted light curve shows two overlapping peaks. The first peak is starting at ~T-5 sec and peaking at ~T+0. The second peak is peaking at ~T+15 sec, and roughly exponential decaying out to ~T+100 sec. T90 (15-350 keV) is 135 +- 38 sec (estimated error including systematics). The time-averaged spectrum from T-3.1 to T+197.1 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.53 +- 0.09. The fluence in the 15-150 keV band is 5.0 +- 0.2 x 10^-06 erg/cm2. The 1-sec peak photon flux measured from T-0.26 sec in the 15-150 keV band is 2.2 +- 0.4 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/440285/BA/