TITLE: GCN CIRCULAR NUMBER: 8820 SUBJECT: GRB 090117: GROND Upper Limits DATE: 09/01/18 04:13:15 GMT FROM: Andrea Rossi at TLS Tautenburg A. Rossi (Tautenburg Obs.), F. Olivares (MPE Garching), A. Kupcu Yoldas (ESO), J. Greiner, and A. Yoldas (both MPE Garching) report on behalf of the GROND team: We observed the field of GRB 090117 (SuperAGILE trigger, Donnarumma et al. GCN #8817) simultaneously in g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m MPI/ESO telescope at La Silla (Chile). Observations started at 01:40 UT, about 9 hrs after the GRB. We do not detect any new sources within the 5-sigma Swift/XRT error circle (Breadmore & Evans, GCN #8818). Note that there is a R~16 magnitude star within the XRT position contaminating the search for the GRB afterglow. Co-added images of the first 8 minutes yield the following specific limits (in AB magnitudes): g' > 23.7 r' > 24.1 i' > 23.2 z' > 22.2 J > 21.9 H > 20.9 K > 20.3 The magnitudes are calibrated against the GROND zeropoints and 2MASS field stars.