489 citations · 564 across the 6 of their papers we have counts for
6 papers
Identification of high-redshift X-ray active galactic nuclei in the 4XMM-DR11 serendipitous catalogue using DES data: Comparative analysis with optically-selected QSOs
E. Pouliasis, A. Ruiz, I. Georgantopoulos +8
X-rays provide a robust method in identifying AGN. However, in the high-redshift Universe, their space density is relatively low, and, in combination with the small areas covered b…
X-ray and UV observations of V751 Cyg in an optical high state
K. L. Page, J. P. Osborne, A. P. Beardmore +3
Aims: The VY Scl system (anti-dwarf nova) V751 Cyg is examined following a claim of a super-soft spectrum in the optical low state. Methods: A serendipitous XMM-Newton X-ray observ…
On the nature of high X-ray luminosities in SDSS galaxies
F. E. Jackson, T. P. Roberts, D. M. Alexander +5
Surveys have revealed a class of object displaying both high X-ray luminosities (Lx > 10^42 erg/s), and a lack of a discernible active galactic nucleus (AGN) in the optical band. I…
Average Fe K-alpha emission from distant AGN
A. Corral, M. J. Page, F. J. Carrera +7
One of the most important parameters in the XRB (X-ray background) synthesis models is the average efficiency of accretion onto SMBH (super-massive black holes). This can be inferr…
The XMM-Newton Serendipitous Survey. V. The Second XMM-Newton Serendipitous Source Catalogue
M. G. Watson, A. C. Schröder, D. Fyfe +47
Aims: Pointed observations with XMM-Newton provide the basis for creating catalogues of X-ray sources detected serendipitously in each field. This paper describes the creation and…
An X-ray bright ERO hosting a type 2 QSO
P. Severgnini, A. Caccianiga, V. Braito +8
We present the XMM-Newton and the optical-VLT spectra along with the optical and the near-infrared photometric data of one of the brightest X-ray (F(2-10 keV)~1e-13 erg/s cm^2) ext…