TITLE: GCN CIRCULAR NUMBER: 6787 SUBJECT: GRB 070913: Afterglow candidate detected by TAROT La Silla observatory DATE: 07/09/13 20:07:45 GMT FROM: Alain Klotz at CESR-CNRS Klotz, A. (CESR-OMP), Boer M. (OHP), Atteia J.L. (LATT-OMP) report: We analyzed our set of unfiltered images described in GCNC 6783 taking account for the new position provided by Sato et al. (GCNC 6786). On the two first images, we find a fading optical transcient candidate for the GRB 070913 afterglow at 1.29 arcmin from the BAT position (which is within the 1.7 arcmin radius of BAT). TAROT afterglow candidate position: RA(J2000) = 15h 15m 01.3s Dec(J2000) = -24d 17' 35" with an uncertainty of 1 arcsec radius. t0+87s to t0+117s : R ~ 17.5 t0+124s to t0+154s : R ~ 18 t0+288s to t0+378s : R > 18 Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction. Screen copies are available at URL: http://www.cesr.fr/~klotz/grb070913 This message may be cited.