TITLE: GCN CIRCULAR NUMBER: 16898 SUBJECT: GRB 141005A: GROND observations DATE: 14/10/06 19:22:24 GMT FROM: Sebastian Schmidl at TLS Tautenburg S. Schmidl (TLS Tautenburg), J. F. Graham, and J. Greiner (both MPE Garching) report on behalf of the GROND team: We observed the field of GRB 141005A (Swift trigger 614415; V. D'Elia et al., GCN #16882) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2 m MPG telescope at ESO La Silla Observatory (Chile). We detect a source consistant with the position reported by Perley et al. (GCN #16884). From coadded observations, starting on October 05 and spanning from 23:50 to 00:04 UT, we report the following preliminary magnitudes and upper limits (AB magnitude system) of: g' > 21.6, r' = 21.7 +/- 0.2, i' = 21.7 +/- 0.2, z' = 21.2 +/- 0.2, J > 20.5, H > 19.9, and K > 18.2. Given magnitudes and upper limits are calibrated against SDSS as well as 2MASS field stars and are not corrected for the expected Galactic foreground extinction corresponding to a reddening of E_(B-V)=0.17 mag in the direction of the burst (Schlegel et al. 1998).