GCN Circular 7599
T. Kruehler, J. Greiner, A. Kupcu Yoldas, C. Clemens, A. Yoldas (all MPE Garching) and G. Szokoly (Eoetvoes Univ. Budapest and MPE Garching) report on behalf of the GROND team: We observed the field of GRB 080413B detected by Swift/BAT (trigger 309111, Stamatikos et al. 2008, GCN Circ. 7598) simultaneously in g'r'i'z'JHK with GROND mounted at the 2.2m ESO/MPI telescope at La Silla Observatory (Chile). Observations started at 08:56 UT on April 13th, 2008, 5 min after the burst. We detect a new bright point source at RA (J2000.0) = 21:44:34.67 DEC (J2000.0) = -19:58:52.4 with an uncertainty of 0.5", which is consistent with the UVOT position. The object is detected in all seven bands, implying a redshift smaller than 3.5. Preliminary photometry of the first 4 min exposure yields an J band magnitude of 16.5 calibrated against 2MASS field stars. The given magnitude is not corrected for the Galactic foreground reddening of E(B-V)=0.04 mag (Schlegel et al., 1998).