The GRB 090424 was succesfully observed at Taurus Hill Observatory 24./25.4.2009. The results of this observation was published in the NASA GCN circular number 9246 (by Markku Nissinen and Veli-Pekka Hentunen).
Link to the circular: GCN 9246
Observers: Markku Nissinen and Veli-Pekka Hentunen.