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GCN Circular 9187

GRB 090422: Liverpool Telescope observations
2009-04-22T10:19:52Z (15 years ago)
Cristiano Guidorzi at Ferrara U,Italy <>
C. Guidorzi (U. Ferrara), D. Bersier, A. Melandri, C.J. Mottram,
C.G. Mundell, R.J. Smith, I.A. Steele (Liverpool JMU) on behalf of
a large collaboration report:

On 2009 April 22 at 03:37:40 UT the 2-m Liverpool Telescope robotically
reacted and began observing the Swift GRB 090422 (Ukwatta et al.,
GCN Circ. 9185) using the r',i', and z' filters, corresponding to
2.40 min after the BAT trigger time.

Inside the revised XRT error circle we detect a single object of
r' ~ 19 mag, which is already present in the DSS archive images and
shows no significant fading from 10 min to 1 hr post burst.
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