GCN Circular 9493
Subject
GRB 090607: GRAS001 optical observations
Date
2009-06-07T09:00:11Z (15 years ago)
From
Veli-Pekka Hentunen at Taurus Hill Obs,A95 <veli-pekka.hentunen@kassiopeia.net>
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