Fabio La Franca

A broad-line region origin for the iron Kα line in NGC 7213

The X-ray spectrum of NGC7213 is known to present no evidence for Compton reflection, a unique result among bright Seyfert 1s. The observed neutral iron K

X-ray spectra transmitted through Compton-thick absorbers

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Quasar Clustering: Evidence for an Increase with Redshift and Implications for the Nature of Active Galactic Nuclei

line, therefore, cannot be associated with a Compton-thick material, like the disc or the torus, but is due to Compton-thin gas, with the Broad Line Region (BLR) as the most likely candidate. To check this hypothesis, a long Chandra HETG observation, together with a quasi-simultaneous optical spectroscopic observation at the ESO NTT EMMI were performed. We found that the iron line is resolved with a FWHM=

Simultaneous X-ray and optical observations of true type 2 Seyfert galaxies

2 400^{+1 100}_{-600}

The European Large Area ISO Survey – IX. The 90-μm luminosity function from the Final Analysis sample

km/s, in perfect agreement with the value measured for the broad component of the H

A New Cosmological Distance Measure Using Active Galactic Nucleus X-Ray Variability

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The SA 94 QSO surveys. V - an UVx sample of 97 QSOs with B not greater than 19.9

,

The NGC 3341 minor merger: a panchromatic view of the active galactic nucleus in a dwarf companion

2640^{+110}_{-90}

The dusty environment of quasars: far-infrared properties of optical quasars

km/s. Therefore, NGC7213 is the only Seyfert 1 galaxy whose iron K

The optical-UV emissivity of quasars: Dependence on black hole mass and radio loudness

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