TITLE: GCN CIRCULAR NUMBER: 35476 SUBJECT: GRB 240102A: Swift-BAT refined analysis DATE: 24/01/03 23:33:27 GMT FROM: Amy <yarleen@gmail.com> M. J. Moss (GSFC), S. D. Barthelmy (GSFC), J.D. Gropp (PSU), H. A. Krimm (NSF), S. Laha (GSFC/UMBC), A. Y. Lien (U Tampa), C. B. Markwardt (GSFC), D. M. Palmer (LANL), T. Parsotan (GSFC), T. Sakamoto (AGU), M. Stamatikos (OSU) (i.e. the Swift-BAT team): Using the data set from T-60 to T+243 sec from the recent telemetry downlink, we report further analysis of BAT GRB 240102A (trigger #1205899) (Gropp et al., GCN Circ. 35461). The BAT ground-calculated position is RA, Dec = 96.848, -20.011 deg which is RA(J2000) = 06h 27m 23.5s Dec(J2000) = -20d 00' 39.0" with an uncertainty of 2.4 arcmin, (radius, sys+stat, 90% containment). The partial coding was 100%. The mask-weighted light curve show some weak emission that starts at ~T+8 s and ends at ~T+140 s. T90 (15-350 keV) is 119.00 +- 30.59 sec (estimated error including systematics). The time-averaged spectrum from T+8.00 to T+142.00 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 2.00 +- 0.22. The fluence in the 15-150 keV band is 8.5 +- 1.3 x 10^-7 erg/cm2. The 1-sec peak photon flux measured from T+65.00 sec in the 15-150 keV band is 0.4 +- 0.1 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/1205899/BA/ View this GCN Circular online at https://gcn.nasa.gov/circulars/35476. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...