Giorgio Matt Editor

Ronaldo Bellazzini is Director of Research at the Istituto Nazionale di Fisica Nucleare (INFN), Italy. His main research interests are particle astrophysics, X-ray polarimetry, and the development of highly innovative particle detectors. Enrico Costa is Director of Research at the Istituto di Astrofisica Spaziale e Fisica Cosmica-Roma of the Istituto Nazionale di Astrofisica (INAF). His areas of research are in X-ray and gamma-ray astrophysics and polarimetry. Giorgio Matt is a Professor at the Physics Department, Universitá Roma Tre, where he teaches both basic physics and astrophysics. His research activities are concerned mainly with the physics of accretion onto black holes, from both theoretical and observational points of view. Gianpiero Tagliaferri is an Associate Astronomer at the Brera Astronomical Observatory of INAF. His research activities deal with the studies of gamma-ray bursts, active galactic nuclei, and with the development of new X-ray focussing telescopes.