INAF - Osservatorio Astronomico di Brera, via Brera 28,
2 Dipartimento di Fisica, Universitá degli Studi di Milano-Bicocca, Piazza Della Scienza 3, 20126 Milano, Italy
3 Instituto de Física de Cantabria (CSIC-UC), Avenida de los Castros, 39005 Santander, Spain
4 X-ray & Observational Astronomy Group, Department of Physics and Astronomy, Leicester University, Leicester LE1 7RH, UK
Received: 6 September 2012
Accepted: 15 November 2012
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 Hβ and MgIIλ2798 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.
Key words: galaxies: active / galaxies: nuclei / X-rays: galaxies / surveys
Based on observations collected at the Telescopio Nazionale Galileo (TNG) and at the European Southern Observatory (ESO), La Silla, Chile and on observations obtained with XMM-Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and the USA (NASA).
Table 1 is available in electronic form at http://www.aanda.org
© ESO, 2013