... absorption

Tables 2-8 and 10 are only available in electronic form at http://www.edpsciences.org

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... two

Both 1425+267 and 1543+489 have been observed by XMM-Newton but there were no public data.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

...$\xi$

The ionization parameter $\xi$ is defined as $\xi = L/nr^{2}$, where L is the isotropic luminosity of the ionizing source in the interval 5 eV to 300 keV, n is the number density of the warm plasma and r is the distance between the latter and the central source.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... limit

The five high-z QSOs: 1115+080, 1206+459, 1407+265, 1630+377, 2302+029 as well as 2212+139 were excluded from the last three correlation analysis since there are no optical data available in the literature. For the calculation of $\dot{m}$ we applied the Eq. (1) reported in P04.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... of 40 QSOs

For objects obscured by heavy absorption as 1411+442 and 2214+139, however, the presence of the additional soft power law component can be more properly explained in terms of scattered emission from the absorbing medium and/or partial covering than a truly soft excess "emission''.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... gas

There is also a strong suggestion of the presence of a warm absorber in 1411+442 (e.g. Sect. 3.4; Brinkmann et al. 2004a).

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.