Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 8826

GRB 090118: GROND Upper Limits
2009-01-19T02:23:14Z (15 years ago)
Andrea Rossi at TLS Tautenburg <>
F. Olivares (MPE Garching), A. Rossi (Tautenburg Obs.), A. Kupcu Yoldas (ESO), J. Greiner, and A. Yoldas (both MPE Garching) report on behalf
of the GROND team:

We observed the field of the possible GRB 090118 (Swift BATSS trigger, Copete et al. GCN
#8825) 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 00:55 UT, about 11 hrs after the GRB.

Comparison to the Digital Sky Survey reveals no new sources within the Swift/BAT error circle
(Copete et al. GCN #8825). Co-added images of the first 8 minutes yield the following 5-sigma limits (in AB magnitudes):

r' > 23.2
i' > 22.5

The magnitudes are calibrated against SDSS.
Looking for U.S. government information and services? Visit