GCN Circular 9202

N. Tanvir (U. Leicester), A. Levan (U. Warwick), T. Kerr (JACH),
T. Wold (JACH)

We observed the field of GRB 090423 with WFCAM on UKIRT, beginning at
08:16 (UT), approximately 20 minutes post-burst.  We detect a faint
source in the K-band image just outside the revised XRT error circle,
at coordinate:

 09 55 33.29  +18 08 57.8 (J2000, estimated uncertainty 0.3 arcsec)

The source has a magnitude K~17.5, but does not appear in SDSS images,
and therefore is very red. The image is also extended in the E-W
direction, and so might be (or include) a dusty host galaxy.  However,
we caution that the images are slightly trailed and so further work is
required to determine whether this source is a point source or not.