TITLE:   GCN CIRCULAR
NUMBER:  9236
SUBJECT: GRB 090424: Optical observations from 1.23m CAHA
DATE:    09/04/24 22:59:07 GMT
FROM:    Javier Gorosabel at IAA-CSIC  <jgu@iaa.es>

J. Gorosabel, P. Kubanek , M.  Jelinek (IAA-CSIC), A. de Ugarte  
Postigo (ESO),
J. Aceituno (CAHA), report on behalf of a larger collaboration:

We have observed the field of GRB 090424 (Cannizzo et al., GCN 9223)  
with
the 1.23m telescope at Calar Alto. The afterglow is clearly detected  
in BVRI-bands.
On April 24.87 UT the afterglow showed a magnitude of R = 19.3 +/-  
0.1, as
compared to stars from the USNO-B1.0.

Calar Alto is operated jointly by MPIA and IAA-CSIC.

Further observations are ongoing.