274 citations · 473 across the 7 of their papers we have counts for
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astro-ph2008★ 126 cited
Correlated X-ray/Optical Variability in the Quasar MR2251-178
P. Arévalo, P. Uttley, S. Kaspi +3
Emission from Active Galactic Nuclei is known to vary strongly over time over a wide energy band, but the origin of the variability and especially of the inter-band correlations is…
astro-ph2008★ 274 cited
The Hard X-ray Spectrum as a Probe for Black-Hole Growth in Radio-Quiet Active Galactic Nuclei
Ohad Shemmer, W. N. Brandt, Hagai Netzer +2
We study the hard-X-ray spectral properties of ten highly luminous radio-quiet (RQ) active galactic nuclei (AGNs) at z=1.3-3.2, including new XMM-Newton observations of four of the…