High-redshift GPS/CSS quasars

GigaHertzPeaked Spectrum (GPS) and Compact Steep Spectrum (CSS) sources arebelieved to be either young or frustrated versions.. of the largescale radiosources. In Xray surveys they constitute a high fraction of sources at highredshifts, they are the brightest quasars at radio, optical, and Xraywavelengths, and they are frequently associated with intrinsic excessabsorption. Highz quasars give, on the other hand, precious information on thephysical conditions in the early Universe. We propose an observation of a sampleof highz GPS quasars, with the purposes of studying the connection between theGPS phenomenon and intrinsic absorption at high redshift and to examine thespectral differences with respect to the bulk of radioloud quasars. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]