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 9493

GRB 090607: GRAS001 optical observations
2009-06-07T09:00:11Z (15 years ago)
Veli-Pekka Hentunen at Taurus Hill Obs,A95 <>
Markku Nissinen (Taurus Hill Observatory) and Veli-Pekka Hentunen (Taurus
Hill Observatory) report:

We used Global-rent-a-scope GRAS001 Tak Mewlon 0.30m telescope with FLI 
IMG1024 Dream Machine at RAS Observatory Mayhill H06 (New Mexico, USA) 
for follow-up observations of GRB090607 (F. E. Marshall et al., GCN 9491).
The observations were started on June 7, at 06:11 UTC (1.0 hours after the
burst) and stopped on June 7, at 07:12 UTC. Three unfiltered 120s and two
unfiltered 600s images were taken. We did not find any new object in the
XRT error circle. Upper limit for the observations is >18.5 mag (3UL).
Quoted upper limit has been derived using POSSII J and USNO-B1.0 field 
stars as reference.

Filter          Tmid(s)       Exp(s)     Mag (CR) USNO-B1.0

unfiltered         07:01:32      2x600      >18.5
Looking for U.S. government information and services? Visit