Your ID: 0116         
First name: Cristian           
Last name: Vignali           
Affiliation: Dipartimento di Astronomia, Universita` di Bologna, Italy 


Title:  THE REALM OF THE FIRST QUASARS IN THE UNIVERSE
Authors: C. vignali
Topic: 1

Abstract:
Quasars at z>4 provide direct information on the first massive structures
to form in the Universe. During the past six years, over 100 quasars at z>4
have been detected in the X-rays; here we review the results from Chandra and
XMM-Newton and provide a broad-band perspective.