High energy behaviour of Neutron Star Low Mass X-ray binary systems seen by INTEGRAL

Abstract

We report on the study of the high energy emission of Neutron Stars in Low Mass X-ray Binary systems performed with INTEGRAL. The X and Gamma behaviour of a selected sample of atoll sources has been monitored through the study of light curves in different energy bands, the construction of hardness-intesity diagrams, and extraction of spectra to discern the physical parameters dominating the spectral variations. We re-constructed the "Bursters Box" with the source analysed plus other persistent bursters and Z sources as revealed by the deep IBIS survey. This allows to compare amongst themselves the sources sample.