@article{10902/28850,
year = {2013},
url = {https://hdl.handle.net/10902/28850},
abstract = {Aims. We derive masses of the central supermassive black hole (SMBH) and accretion rates for 154 type 1 AGN belonging to a well-defined X-ray-selected sample, the XMM-Newton serendipitous sample (XBS).

Methods. We used the most recent ?single-epoch? relations, based on H? and MgII?2798 Å emission lines, to derive the SMBH masses. We then used the bolometric luminosities, computed on the basis of an SED-fitting procedure, to calculate the accretion rates, both absolute and normalized to the Eddington luminosity (Eddington ratio).

Results. The selected AGNs cover a range of masses from 107 to 1010 M? with a peak around 8 × 108 M? and a range of accretion rates from 0.01 to ~50 M?/year (assuming an efficiency of 0.1), with a peak at ~1 M?/year. The values of Eddington ratio range from 0.001 to ~0.5 and peak at 0.1.},
organization = {We thank the referee for useful comments that significantly improved the paper and Tommaso Maccacaro for his initial involvement in the XBS project. The authors acknowledge financial support from ASI (grants No. I/088/06/0 and I/009/10/0). S.M. acknowledges financial support by the Spanish Ministry of Economy and Competitiveness, through grant AYA2010-21490-C02-01},
publisher = {EDP Sciences},
publisher = {Astronomy & Astrophysics, 2013,  549, A119},
title = {Black-hole masses of type 1 AGN in the XMM-Newton bright serendipitous survey},
author = {Caccianiga, A. and Fanali, R. and Severgnini, P. and Della Ceca, R. and Marchese, E. and Mateos Ibáñez, Silvia},
}