6 Conclusions

In our analysis we found a significant selection on the BeppoSAX GRB coordinates, while there is no evidence for a selection on X- or gamma-ray intensity. As expected, there is a significant bias on the duration in the BeppoSAX/WFC GRBs sample. To partially overcome this problem the BeppoSAX Science Operation Center is setting-up a procedure for screening data from the GRBM and WFC with a time resolution of 100 ms (also checking BATSE triggers, on a temporal rather than spatial basis) ([Smith et al. 1999]).