16 citations · 16 across the 1 of their papers we have counts for
3 papers
The most luminous blue quasars at 3.0<z<3.3. II. CIV/X-ray emission and accretion disc physics
Elisabeta Lusso, Emanuele Nardini, Susanna Bisogni +12
We analyse the properties of the CIV broad emission line in connection with the X-ray emission of 30 bright SDSS quasars at z~3.0-3.3 with pointed XMM-Newton observations, which we…
Cosmography by orthogonalized logarithmic polynomials
Giada Bargiacchi, G. Risaliti, M. Benetti +4
Cosmography is a powerful tool to investigate the Universe kinematic and then to reconstruct dynamics in a model-independent way. However, recent new measurements of supernovae Ia…
Quasars as standard candles III. Validation of a new sample for cosmological studies
E. Lusso, G. Risaliti, E. Nardini +15
We present a new catalogue of ~2,400 optically selected quasars with spectroscopic redshifts and X-ray observations from either Chandra or XMM-Newton. The sample can be used to inv…