First of all, I am deeply grateful to Enrico Montanari for the fruitful collaboration, especially concerning the localization technique and its applications to this catalog of bursts: without his contribution, several results reported in this thesis could not have been achieved; I also thank Francesco Calura for finalizing the Monte Carlo model of the BeppoSAX payload used for extracting the GRBM response matrices.
It has been a pleasure and a privilege to work on the data of such an important scientific mission like BeppoSAX, in particular on the GRBM that, in combination with the WFC/BeppoSAX, has had and still has a key role in the advance of the GRB knowledge by allowing the discovery of the GRB afterglows; for this, I am really grateful to my thesis advisor, Filippo Frontera, that gave me this opportunity, and for his high standards in research, particularly in GRB field.
I would like to thank Lorenzo Amati of ITESRE (CNR, Bologna) and Barbara Preger (IAS-CNR, Rome) for the countless helpful discussions. I thank Gerardo D'Andreta and all the BeppoSAX SOC duty scientists (Telespazio, Rome), who patiently complied with all my requests, and for their precious collaboration on the on-line quest activities; I am grateful to Luca Chioccoloni (ASI Science Data Center, Rome) for providing several GRBM FOTs at my urgent requests, and to Milvia Capalbi and Sonia Rebecchi (ASDC) as well.
I am glad to thank Kevin Hurley (University of California, Berkeley) for the fruitful GRBM-Ulysses collaboration, and also Jean in 't Zand (Astronomical Institute, Utrecht Univ., and SRON) for giving me WFC data; I am also grateful to Mauro Orlandini (ITESRE-CNR) for introducing me in the GRBM FOT archival data.
I acknowledge the system managers of the Physics Department of Ferrara, Alberto Gianoli and Michele Gambetti, for helping me in administrating the workstations and PCs I worked at.
I thank col. TS Kelso (Director of the Air Force Space Command -AFSPC- Space Analysis Center -ASAC- at Peterson AFB, Colorado) for supplying me with NORAD two-line elements of the whole BeppoSAX lifetime.
My family and my grand-mother deserve special thanks for their steady support and, above all, for not protesting against me, since I non-stop worked with their home PC every weekend.
Finally, I really feel grateful to all people that have taken a lot of trouble for saving BeppoSAX, and, above all, to BeppoSAX itself for being still working, in spite of six years of successful scientific activities.