523 citations · 9k across the 172 of their papers we have counts for
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X-ray Variability Study of Polar Scattered Seyfert 1 Galaxies
Tobias Beuchert, Jörn Wilms, Matthias Kadler +4
We study 12 Seyfert 1 galaxies with a high level of optical polarization. Optical light emerging from the innermost regions is predominantly scattered in a polar region above the c…
A Chandra view of the clumpy reflector at the heart of the Circinus galaxy
A. Marinucci, G. Miniutti, S. Bianchi +2
We present a spectral and imaging analysis of the X-ray reflecting structure at the heart of the Circinus galaxy, investigating the innermost regions surrounding the central black…
A high Eddington-ratio, true Seyfert 2 galaxy candidate: implications for broad-line-region models
G. Miniutti, R. D. Saxton, P. M. Rodriguez-Pascual +5
A bright, soft X-ray source was detected on 2010 July 14 during an XMM--Newton slew at a position consistent with the galaxy GSN 069 (z=0.018). Previous ROSAT observations failed t…
The X-ray variability history of Markarian 3
M. Guainazzi, V. La Parola, G. Miniutti +2
We aim at constraining the geometry of the reprocessing matter in the nearby prototypical Seyfert 2 Galaxy Markarian 3 by studying the time evolution of spectral components associa…
Extreme Warm Absorber variability in the Seyfert Galaxy Mrk 704
Giorgio Matt, Stefano Bianchi, Matteo Guainazzi +8
In about half of Seyfert galaxies, the X-ray emission is absorbed by an optically thin, ionized medium, the so-called "Warm Absorber", whose origin and location is still a matter o…
Long-term AGN variability and the case of GSN 069
Richard Saxton, Andrew Read, Pilar Esquej +2
We report on a study of long-term flux variations in a sample of more than 1000 AGN observed with ROSAT and in the XMM-Newton slew survey. Over a period of 3-19 years, NLS1 galaxie…