TITLE: GCN CIRCULAR NUMBER: 6703 SUBJECT: GRB 070724B: Swift-XRT afterglow confirmation DATE: 07/08/03 09:02:34 GMT FROM: Pat Romano at OAB-Swift P. Romano, C. Guidorzi(Uni-Bicocca and OAB), A. Moretti(OAB), report on behalf of the Swift-XRT team: Using all data collected by Swift/XRT obtained for GRB 070724B detected by SuperAGILE (Feroci et al., GCN Circ. 6668), for a total of 16.5 ks (between T+19.1 hours and T+7.5 days), we can now confirm that the candidate proposed in GCN Circ. 6675 (Romano et al.) is the afterglow of GRB 070724B. Its final position is RA,DEC(J2000)=17.48477,57.67620, which is RA(J2000) = 01 09 56.34 Dec(J2000) = +57 40 34.3 with an uncertainty of 3.9 arcsec (radius, 90% containment). This is 0.4 arcsec from the X-ray position given in Romano et al., GCN Circ. 6675) and 4.6 arcmin from the initial SuperAGILE position (Feroci et al., GCN Circ. 6668). The light curve can be fit with a power-law power-law with slope of 1.19+0.23-0.19 (90% cl). No further observations with Swift are planned. This circular is an official product of the Swift XRT team.