出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：In October-November 2009, our collaboration performed an unprecedented joint XMMINTEGRAL campaign consisting of 10 4-day separated observations of the bright Seyfert 1 galaxy Mrk 509, totaling 600 ks for XMM and 1.2 Ms for INTEGRAL, complemented by HST, Chandra, Swift/XRT and ground-based optical observations. Among the numerous science goals, we present here the study of the broad-band emission, from the UV up to the hard X-rays (0.003– 250 keV), which we attempt to model with physically motivated models. The variability pattern of the UV and X-ray emission points to a Comptonization origin of the soft-excess in a warm, very optically thick plasma. The absence of detectable high-energy cut-off (EC > 200 keV) and the high UV-to-X ratio point to the existence of a very hot (kTC 500 keV), optically-thin (t 0:025) corona. The corona parameters are found to be consistent with those expected from a passive disk in radiative equilibrium with the corona in a slab geometry.
