INTEGRAL MONITORING OF THE BRIGHT NEUTRON STAR LOW MASS X-RAY BINARIES: PRELIMINARY RESULTS ON GX 17+2

摘要

GX17+2 is a bright Neutron Star Low Mass X-ray Binary. Albeit significant results were obtained from previous campaigns, many open points still remain in the understanding of such a source, in particular the origin (thermal or not) of the hard component and its behavior with the spectral state. INTEGRAL offers the opportunity to reduce these ambiguities. Combining data from JEM-X, IBIS and SPI to provide a complete soft to hard energy coverage, we report preliminary results based on the first year Core Program observations of GX 17+2 .