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 9238

GRB 090424: Liverpool Telescope observations
2009-04-24T23:24:58Z (15 years ago)
Cristiano Guidorzi at Ferrara U,Italy <>
C. Guidorzi (U. Ferrara), D. Bersier (Liverpool JMU),
and N. Tanvir (U. Leicester) on behalf of a larger
collaboration report:

We began observing the field of GRB 090424 (Cannizzo et al.
GCN Circ. 9223) with the 2-m Liverpool Telescope at
21:29:47 UT. We clearly detect the optical afterglow
(Cannizzo et al. GCN Circ 9223; Yuan et al. GCN Circ. 9224;
Xin et al. GCN Circ. 9225; Schady et al. GCN Circ. 9234;
Gorosabel et al. GCN Circ. 9236) with r'=19.93 � 0.03
at a mid epoch of 7.55 hrs post burst from a 6x300 s coadded
exposure. Calibration was performed with respect to nearby
SDSS field stars.
Looking for U.S. government information and services? Visit