TITLE: GCN CIRCULAR NUMBER: 20356 SUBJECT: GRS 1716-249/GRO J1719-24/V2293 Oph, Swift-BAT refined analysis DATE: 17/01/02 19:30:58 GMT FROM: Amy Lien at GSFC J. R. Cummings (CPI), S. D. Barthelmy (GSFC), N. Gehrels (GSFC), H. A. Krimm (NSF/USRA), 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-239 to T+963 sec from the recent telemetry downlink, we report further analysis of BAT detection of GRS 1716-249 (a.k.a. GRO J1719-24 and V2293 Oph; trigger #729410; Barthelmy, et al., GCN Circ. 20352). This source is currently having an outburst that was also detected by MAXI/GSC (Negoro et al. ATEL #9876 and Masumitsu et al. ATEL #9895) and the Swift/BAT transient monitor (see light curves at http://swift.gsfc.nasa.gov/results/transients/weak/Granat1716-249/). The BAT ground-calculated position is RA, Dec = 259.915, -25.010 deg which is RA(J2000) = 17h 19m 39.7s Dec(J2000) = -25d 00' 35.0" with an uncertainty of 2.2 arcmin, (radius, sys+stat, 90% containment). The partial coding was 35%. The mask-weighted light curve shows that the emission lasts throughout the duration when the source was in the BAT field of view from T-133 s to T+158 s. The time-averaged spectrum from T+0.0 to T+112.0 sec is best fit by a simple power-law model. The power law index of the time-averaged spectrum is 1.50 +- 0.24. The fluence in the 15-150 keV band is 1.6 +- 0.2 x 10^-6 erg/cm2. 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/729410/BA/