Speaker
Prof.
Guido Risaliti
(Università di Firenze)
Description
I present the analysis of a sample of several hundred SDSS quasars with multiple serendipitous XMM-Newton observations. The X-ray to UV luminosity relation allows to predict the average X-ray flux, and to select only the X-ray observations that are deep enough to remove any bias towards higer-than-average flux states. The optical/UV SDSS spectrum allows to investigate the relation between X-ray variability and the total luminosity, the black hole mass, and the Eddington ratio. Considering that the optical/UV and X-ray observations are not correlated, I conclude that most of the "intrinsic" dispersion of the X-ray to UV relation is due to X-ray variability.
Primary authors
Prof.
Guido Risaliti
(Università di Firenze)
Ms.
Matilde Signorini
(Università di Firenze)
Dr.
Elisabeta Lusso
(Università di Firenze)
Dr.
Emanuele Nardini
(INAF-Arcetri Observatory)
