3 Summary and conclusions

Several detection processes running in parallel on ground will allow to trigger on GRBs of a wide range of given durations. Simulations have shown that about 20 bursts per year will be localized with arcminute accuracy only tens of seconds after their occurence. IBAS will distribute their positions in near real time via TCP/IP or e-mail to all parties interested. Additionally, INTEGRAL data of $\sim 300$ annual GRBs, via the SPI ACS, will contribute to the IPN localization.