340 citations · 1.7k across the 25 of their papers we have counts for
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astro-ph2008★ 108 cited
Long term optical and X-ray variability of the Seyfert galaxy Markarian 79
E. Breedt, P. Arévalo, I. M. McHardy +8
We present the results of concurrent X-ray and optical monitoring of the Seyfert 1 galaxy Mrk 79 over a period of more than five years. We find that on short to medium time-scales…
astro-ph2008★ 55 cited
A Comprehensive X-ray Spectral Analysis of the Seyfert 1.5 NGC 3227
A. Markowitz, J. N. Reeves, I. M. George +5
We present results of a 100 ks XMM observation of the Seyfert 1.5 NGC 3227. Our best-fit broadband model to the pn spectrum consists of a moderately flat (photon index 1.57) hard X…
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…