TITLE: GCN CIRCULAR NUMBER: 14775 SUBJECT: GRB 130605A: TAROT La Silla observatory optical detection of the afterglow DATE: 13/06/06 00:39:55 GMT FROM: Alain Klotz at IRAP-CNRS-OMP Klotz A. (IRAP-CNRS-OMP), Gendre B. (IRAP-CNRS-OMP), Boer M., Siellez K., Dereli H., Bardho O. (UNS-CNRS-OCA), Atteia J.L. (IRAP-CNRS-OMP) report: We imaged the field of GRB 130605A detected by SWIFT (trigger 557508) with the TAROT robotic telescope (D=25cm) located at the European Southern Observatory, La Silla observatory, Chile. The observations started 32.7s after the GRB trigger (12.8s after the notice). The elevation of the field decreased from 51 degrees above horizon and weather conditions were excellents. We detect a new fading source in the error box given by SWIFT at the following position (+/- 3 arcsec): RA(J2000.0) = 08h 58m 08.53s DEC(J2000.0) = +33d 27' 40.1" OT was R = 15.1 at 121s after GRB. OT was R = 18.4 at 1705s after GRB. The first image is trailed with a duration of 60.0s (see the description in Klotz et al., 2006, A&A 451, L39). The afterglow is seen but the trail is overlaped by another star and will be analyzed in details later. Magnitudes were estimated with the nearby USNO-B1 stars and are not corrected for galactic dust extinction. N.B. Galactic coordinates are lon=257.1493 lat= +7.9340 and the galactic extinction in R band is about 0.9 magnitude estimated from D. Schlegel et al. 1998ApJ...500..525S.