453 citations · 4.4k across the 76 of their papers we have counts for
30 papers · 1 filter
X-ray properties of a sample of polar-scattered Seyfert galaxies
E. Jimenez-Bailon, M. Guainazzi, G. Matt +5
We present the results on an XMM-Newton systematic analysis of a sample of nine Seyfert 1 galaxies. When observed in polarised light, the spectra of the selected sources are simila…
XMM-Newton view of galaxy pairs: activation of quiescent black holes?
E. Jimenez-Bailon, N. Loiseau, M. Guainazzi +4
We report on XMM-Newton observations of three nearby galaxy pairs, AM0707-273, AM1211-465, and AM2040-674. All six galaxies were previously classified as HII galaxies based on opti…
The XMM-Newton/INTEGRAL monitoring campaign of IGR J16318-4848
A. Ibarra, G. Matt, M. Guainazzi +5
IGR J16318-4848 is the prototype and one of the more extreme examples of the new class of highly obscured Galactic X-ray sources discovered by INTEGRAL. A monitoring campaign on th…
The XMM-Newton view of GRS1915+105 during a "plateau"
Andrea Martocchia, Giorgio Matt, Tomaso Belloni +3
Two XMM-Newton observations of the black-hole binary GRS1915+105 were triggered in 2004 (April 17 and 21), during a long "plateau" state of the source. We analyzed the data collect…
The XMM-Newton View of GRS1915+105
Andrea Martocchia, Giorgio Matt, Tomaso Belloni +3
(abridged) Two XMM-Newton observations of the black-hole binary GRS1915+105 were triggered in 2004, during a long "plateau" state of the source. (...) While the light curves show j…
XMM-Newton observation of the bright Seyfert 1 galaxy, MCG+8-11-11
G. Matt, S. Bianchi, A. De Rosa +2
We report on the XMM-Newton observation of the bright Seyfert 1 galaxy, MCG+8-11-11. Data from the EPIC/p-n camera, the Reflection Gratings Spectrometers (RGS) and the Optical Moni…
A changing inner radius in the accretion disc of Q0056-363?
G. Matt, D. Porquet, S. Bianchi +4
Q0056-363 is the most powerful X-ray quasar known to exhibit a broad, likely relativistic iron line (Porquet & Reeves 2003). It has been observed twice by XMM-, three and h…
The recent X-ray history of NGC 5506
S. Bianchi, I. Balestra, G. Matt +2
We present a detailed discussion of the spectral and spatial components of NGC 5506, based on XMM-Newton, Chandra and BeppoSAX observations. The overall picture consists of a nucle…
Flux and spectral variations in the Circinus Galaxy
S. Bianchi, G. Matt, F. Fiore +3
We report on a dramatic flux (50 % increase in the LECS and MECS band) and spectral variation between two BeppoSAX observations of the Circinus Galaxy performed almost three years…
The iron Kalpha Compton Shoulder in transmitted and reflected spectra
G. Matt
We calculate the Equivalent Widht of the Core and the centroid energy and relative flux of the 1st order Compton Shoulder of the iron Kalpha emission line from neutral matter. The…
The BeppoSAX broad-band spectrum and variability of the Seyfert 1 NGC 3783
A. De Rosa, L. Piro, F. Fiore +5
BeppoSAX observed the Seyfert 1 galaxy NGC 3783 for ~ 5 days from 1998 June 6 to 1998 June 10. The average flux during the observation was F(2-10 keV) ~ 6 X 10^{-11} erg cm^-2 s^-1…
Wide-band X-ray variability of GRS 1915+105 observed with BeppoSAX
P. Casella, M. Feroci, E. Massaro +9
The Galactic Microquasar GRS 1915+105 was observed by the Narrow Field Instruments onboard BeppoSAX in two pointings during year 2000. We present the preliminary results of wide-ba…
Nuclear obscuration in the high-ionization Seyfert 2 galaxy Tol 0109-383
K. Iwasawa, G. Matt, A. C. Fabian +5
We report the BeppoSAX detection of a hard X-ray excess in the X-ray spectrum of the classical high-ionization Seyfert 2 galaxy Tol0109-383. The X-ray emission of this source obser…
The X-ray spectra of Compton-thick Seyfert 2 galaxies as seen by BeppoSAX
G. Matt, A. C. Fabian, M. Guainazzi +3
Results from BeppoSAX observations of Compton--thick Seyfert 2 galaxies are summarized and reviewed, and their general properties derived and discussed. In five out of the seven ob…
A self-consistent test of Comptonization models using a long BeppoSAX observation of NGC 5548
P. O. Petrucci, F. Haardt, L. Maraschi +6
We test accurate models of Comptonization spectra over the high quality data of the BeppoSAX long look at NGC 5548. The data are well represented by a plane parallel corona with an…
Testing Comptonizing coronae on a long BeppoSAX observation of the Seyfert 1 galaxy NGC 5548
P. O. Petrucci, F. Haardt, L. Maraschi +6
We test accurate models of Comptonization spectra over the high quality data of the BeppoSAX long look at NGC 5548, allowing for different geometries of the scattering region, diff…
Effects of Kerr Spacetime on Spectral Features from X-Ray Illuminated Accretion Discs
A. Martocchia, V. Karas, G. Matt
We performed detailed calculations of the relativistic effects acting on both the reflection continuum and the iron line from accretion discs around rotating black holes. Fully rel…
Mapping the circumnuclear matter of NGC1068 in X-rays
M. Guainazzi, S. Molendi, P. Vignati +2
An-energy dependent variation of the X-ray emission from the archetypical "Compton-thick'' Seyfert 2 galaxy NGC1068 has been observed between two BeppoSAX observations, performed o…
Inner accretion disk disappearance during a radio flare in GRS 1915+105
M. Feroci, G. Matt, G. Pooley +3
Simultaneous X-ray (BeppoSAX, 0.1-300 keV) and radio (Ryle Telescope, 15 GHz) observations of the superluminal galactic source GRS 1915+105 in high flux state were carried out star…
Broad band spectral properties of Seyfert 1 galaxies observed with BeppoSAX
L. Piro, A. De Rosa, M. Dadina +8
We will present some results on the broad--band observations of BeppoSAX of the bright Seyfert galaxies NGC 4151 and NGC 5548.
A Qualitative Test of a Unified Model of Seyfert Galaxies with BeppoSAX
M. Cappi, L. Bassani, G. Malaguti +1
The broad band 0.1-200 keV spectra of a sample of 5 Seyfert 2 galaxies (NGC 7172, Mkn 3, NGC 2110, NGC 4507 and NGC 7674) have been measured within the first year of the …
BeppoSAX observations of Mkn 3: Piercing through the torus of a Seyfert 2 galaxy
M. Cappi, L. Bassani, A. Comastri +15
A new BeppoSAX broad-band (0.6-150 keV) spectrum of the Seyfert 2 galaxy Mkn 3 is presented. The spectrum provides a direct measurement of a large, neutral column of gas with Nh~10…
BeppoSAX Observations of the Radio Galaxy Centaurus A
P. Grandi, C. M. Urry, L. Maraschi
We present preliminary results from two observations of the radio galaxy Centaurus A performed by the BeppoSAX satellite. We did not detect any spectral variation of the nuclear co…
One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays
G. Matt, M. Guainazzi, R. Maiolino +11
The Circinus Galaxy has been observed, for the first time above 10 keV, by BeppoSAX. An excess emission above the extrapolation of the best fit 0.1--10 keV spectrum is apparent in…