TITLE: GCN CIRCULAR NUMBER: 14774 SUBJECT: GRB 130605A: GROND afterglow candidate DATE: 13/06/06 00:28:23 GMT FROM: Sylvio Klose at TLS Tautenburg Nicuesa Guelbenzu, A. (TLS Tautenburg), J. Greiner, Varela, K. (MPE Garching), S. Klose, D. A. Kann (TLS Tautenburg) report on behalf of the GROND team: We observed the field of GRB 130605A (Swift trigger 557508; Holland et al., GCN 14773) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPG/ESO telescope at La Silla Observatory (Chile). Observations started at 23:44:36 UT on June 6, about 3 min after the GRB trigger. Inside the BAT error circle (Holland et al., GCN 14773) we find a source at coordinates RA, DEC (J2000) = 08:58:08.6, -33:27:40.3 which has no counterpart on the DSS2 red. We measure the following preliminary AB magnitude (mean time 23:47:39) r' = 15.8 +/- 0.1, calibrated against GROND zeropoints and 2MASS stars. We suggest that this is the GRB afterglow.