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20002023
most citedX-ray Spectral Variability and Rapid Variability of the Soft X-ray Spectrum Seyfert 1 Galaxies Ark 564 and Ton S180

426 citations · 3.7k across the 70 of their papers we have counts for

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21 papers · 1 filter

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★ 49 cited

The long-term X-ray variability properties of AGN in the Lockman Hole region

I. E. Papadakis, E. Chatzopoulos, D. Athanasiadis +2

We present the results from a detailed X-ray variability analysis of 66 AGN in the Lockman Hole, which have optical spectroscopic identifications. We compare, quantitatively, their…

astro-ph2008★ 17 cited

Fourier-resolved energy spectra of the Narrow Line Seyfert 1 Mkn 766

P. Arevalo, I. M. McHardy, A. Markowitz +4

We compute Fourier-resolved X-ray spectra of the Seyfert 1 Markarian 766 to study the shape of the variable components contributing to the 0.3-10 keV energy spectrum and their time…

astro-ph2007★ 30 cited

Wide-band spectroscopy of the Compton thick Seyfert 2 galaxy Mrk 3 with Suzaku

Hisamitsu Awaki, Naohisa Anabuki, Yasuchi Fukazawa +15

We obtained a wide-band spectrum of the Compton-thick Seyfert 2 galaxy Mrk 3 with Suzaku. The observed spectrum was clearly resolved into weak, soft power-law emission, a heavily a…

astro-ph2007★ 13 cited

A 100ks XMM-Newton view of the Seyfert 1.8 ESO113-G010. I. Discovery of large X-ray variability and study of the FeKalpha line complex

Delphine Porquet, Phil Uttley, James N. Reeves +6

(Abridged) We present here a long (100ks) XMM-Newton follow-up of the Seyfert 1.8 galaxy ESO113-G010 performed in November 2005, in order to study over a longer time-scale its main…

astro-ph2007★ 64 cited

The Suzaku Observation of the Nucleus of the Radio-Loud Active Galaxy Centaurus A: Constraints on Abundances of the Accreting Material

A. Markowitz, T. Takahashi, S. Watanabe +16

A Suzaku observation of the nucleus of the radio-loud AGN Centaurus A in 2005 has yielded a broadband spectrum spanning 0.3 to 250 keV. The net exposure times after screening were:…