出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：Narrow Line Seyfert 1 galaxies (NLSy1) are among the most interesting class of active nuclei. Their observational properties suggest that they are high accretion rate systems probably associated with relatively smaller back hole masses with respect to classical Seyfert 1 galaxies. However, the number of knownNLSy1 detected above 10 keV is small notwithstanding the importance of the high energy data to discriminate between the major compelling models. Here we present a detailed study of a sample of 15 NLSy1 detected above 10 keV by INTEGRAL/IBIS. An accurate broad-band analysis has been performed using INTEGRAL data combined with XMM-Newton, Suzaku and Swift. The high energy spectral properties have been related to their black hole mass and accretion parameters.
