Publications (198)
Multiwavelength campaign on Mrk 509 VIII. Location of the X-ray absorber
J. S. Kaastra, R. G. Detmers, M. Mehdipour +14
The bright Seyfert 1 galaxy Mrk 509 was monitored by XMM-Newton and other satellites in 2009 to constrain the location of the outflow. We have studied the response of the photoioni…
High-energy monitoring of Seyfert galaxies: the case of NGC 4593
F. Ursini, P. -O. Petrucci, G. Matt +6
We discuss preliminary results from a joint XMM-Newton and NuSTAR monitoring program on the active galactic nucleus NGC 4593, consisting of 5x20 ks observations, spaced by two days…
X-ray spectral variability in PG1535+547: the changing-look of a 'soft X-ray weak' AGN
L. Ballo, M. Giustini, N. Schartel +5
PG1535+547 is a bright NLS1 galaxy, whose high energy emission shows strong variability in shape and flux. ROSAT data classified it as soft X-ray weak QSO (objects whose X-ray-to-o…
XMM-Newton Survey of a Distance-limited Sample of Seyfert Galaxies: Preliminary Spectral Results
M. Cappi, G. Di Cocco, F. Panessa +19
An unbiased estimate of the average intrinsic X-ray properties and column density distribution of Seyfert galaxies in the local Universe is crucial to validate unified models of ac…
First ASCA results for high-redshift Radio-Quiet Quasars
C. Vignali, A. Comastri, M. Cappi +2
Here we report the X-ray spectral analysis of 5 high-redshift () radio-quiet quasars (RQQs) observed with the ASCA satellite. A simple power law with Galactic absorption…
PG 1211+143: probing high frequency lags in a high mass AGN
B. De Marco, G. Ponti, P. Uttley +4
We present the timing analysis of the four archived XMM-Newton observations of PG 1211+143. The source is well-known for its spectral complexity, comprising a strong soft-excess an…
ASCA and ROSAT X-ray Spectra of High-Redshift Radio-Loud Quasars
M. Cappi, M. Matsuoka, A. Comastri +4
Results are presented on the X-ray properties of 9 high-redshift (1.2 < z < 3.4) radio-loud quasars (RLQs) observed by ASCA (10 observations) and ROSAT (11 observations, for a subs…
Outflows and winds in AGNs: a case for Simbol-X
M. Cappi, F. Tombesi, M. Giustini
Chandra and XMM-Newton X-ray observations are accumulating evidence for massive, high velocity outflows in Seyfert galaxies and quasars, most likely originating very close to the c…
New insights on the accretion disk-winds connection in radio-loud AGNs from Suzaku
F. Tombesi, R. M. Sambruna, J. N. Reeves +4
From the spectral analysis of long Suzaku observations of five radio-loud AGNs we have been able to discover the presence of ultra-fast outflows with velocities ~0.1c in three of t…
ASCA detection of the FeK edge in the spectrum of the Seyfert 2 galaxy IRAS 04575-7537: a sign of a complex absorber
C. Vignali, A. Comastri, G. M. Stirpe +5
ASCA X-ray spectral analysis of the Seyfert 2 galaxy IRAS 04575-7537 is presented. The main result is the presence of a significant iron edge at a rest energy of 7.13^+0.21_-0.16 k…
ASCA and ROSAT X-ray Spectra of IC 5063 and NGC 3998
C. Vignali, A. Comastri, M. Cappi +1
The results of the 0.1-10 keV spectral analysis of IC 5063 (Narrow Line Radio Galaxy) and NGC 3998 (LINER) are presented. In both cases there is evidence of a FeK emission line…
BeppoSAX observation of NGC 7674: a new reflection-dominated Seyfert 2 galaxy
G. Malaguti, G. G. C. Palumbo, M. Cappi +6
The Seyfert 2 galaxy NGC 7674 has been observed within the BeppoSAX Core Programme with the onboard narrow field instruments between 0.1 and 100 keV. The broad-band spectrum shows…
The variable ROSAT X-ray spectrum of the BL Lac 0716+714
M. Cappi, A. Comastri, S. Molendi +3
The BL Lac object 0716+714 is a powerful flat spectrum radio source detected by CGRO-EGRET at -ray energies. It has been observed for about 21000 s over two days by the X-ray t…
On the Origin of the FeK Line in the Seyfert 2 Galaxy NGC 7172
M. Dadina, L. Bassani, M. Cappi +6
The Seyfert 2 Galaxy NGC 7172 was observed twice by BeppoSAX narrow field instruments approximately one year apart. As found in previous observations, the source is variable on sho…
Chandra observations of X-ray source overdensities in distant galaxy cluster fields
N. Cappelluti, M. Cappi, M. Dadina +4
The first systematic study of the serendipitous X-ray source density around 10 high z (0.24<z<1.2) clusters performed with Chandra is presented. A factor \~2 overdensity has been f…
Stellar-Mass Black Holes and Their Progenitors
J. M. Miller, P. Uttley, K. Nandra +14
If a black hole has a low spin value, it must double its mass to reach a high spin parameter. Although this is easily accomplished through mergers or accretion in the case of super…
Relativistic inflow in the Seyfert 1 Mrk 335 revealed through X-ray absorption
A. L. Longinotti, S. Sim, K. Nandra +2
The analysis of hard X-ray features in XMM-Newton data of the bright Sy 1 galaxy Mrk 335 is reported here. The presence of a broad, ionised iron K alpha emission line in the spectr…
The WISSHFUL program: the highest redshift UFO discovered in a non-lensed QSO
G. Lanzuisi, L. Borrelli, E. Piconcelli +28
We present the first results from the WISSHFUL program, an XMM-Newton heritage program targeting luminous QSOs at Cosmic Noon. We report on recent simultaneous XMM-Newton and NuSTA…
Multiwavelength campaign on Mrk 509 XIV. Chandra HETGS spectra
J. S. Kaastra, J. Ebrero, N. Arav +14
We present in this paper the results of a 270 ks Chandra HETGS observation in the context of a large multiwavelength campaign on the Seyfert galaxy Mrk 509. The HETGS spectrum allo…
Nustar Measurement Of Coronal Temperature In Two Luminous, High Redshift Qsos
G. Lanzuisi, R. Gilli, M. Cappi +13
X-ray emission from AGN is believed to be produced via Comptonization of optical/UV seed photons emitted by the accretion disk, up-scattered by hot electrons in a corona surroundin…
X-ray Spectral Survey with XMM--Newton of a Complete Sample of Nearby Seyfert Galaxies
M. Cappi, F. Panessa, L. Bassani +15
Results obtained from an X-ray spectral survey of nearby Seyfert galaxies using XMM--Newton are reported. The sample was optically selected, well defined, complete in B mag, and di…
The properties of the X-ray corona in the distant () quasar APM 08279+5255
E. Bertola, C. Vignali, G. Lanzuisi +7
We present new joint XMM-Newton and NuSTAR observations of APM 08279+5255, a gravitationally-lensed, broad-absorption line quasar (). After showing a fairly stable flux ($f…
Multiwavelength campaign on Mrk 509. III. The 600 ks RGS spectrum: unravelling the inner region of an AGN
R. G. Detmers, J. S. Kaastra, K. C. Steenbrugge +13
We present the results of our 600 ks RGS observation as part of the multiwavelength campaign on Mrk 509. The very high quality of the spectrum allows us to investigate the ionized…
Discovery of ultra-fast outflows in a sample of Broad Line Radio Galaxies observed with Suzaku
F. Tombesi, R. M. Sambruna, J. N. Reeves +5
We present the results of a uniform and systematic search for blue-shifted Fe K absorption lines in the X-ray spectra of five bright Broad-Line Radio Galaxies (BLRGs) observed with…
Anatomy of the AGN in NGC 5548. VI. Long-term variability of the warm absorber
J. Ebrero, J. S. Kaastra, G. A. Kriss +13
(Abridged) The archetypal Seyfert 1 galaxy NGC 5548 was observed in 2013-2014 in the context of an extensive multiwavelength campaign, which revealed the source to be in an extraor…
Energy-shifted lines in XMM-Newton spectra of Seyfert Galaxies
A. L. Longinotti, S. Sim, K. Nandra +2
In the recent literature on AGNs it has been often reported that spectra of Seyfert 1 Galaxies show resonant absorption lines of Fe K which are redshifted from the rest frame posit…
X-ray source overdensities in Chandra distant cluster fields: a new probe to map the cosmic tapestry?
N. Cappelluti, M. Cappi, M. Dadina +4
The first systematic study of the serendipitous X-ray source density around 10 high z (0.24<z<1.2) clusters has been performed with Chandra. A factor ~2 overdensity has been found…
Science with Simbol-X
F. Fiore, M. Arnaud, U. Briel +20
Simbol-X is a French-Italian mission, with a participation of German laboratories, for X-ray astronomy in the wide 0.5-80 keV band. Taking advantage of emerging technology in mirro…
Anatomy of the AGN in NGC 5548: V. A clear view of the X-ray narrow emission lines
M. Whewell, G. Branduardi-Raymont, J. S. Kaastra +15
Context. Our consortium performed an extensive multi-wavelength campaign of the nearby Seyfert 1 galaxy NGC 5548 in 2013-14. The source appeared unusually heavily absorbed in the s…
Anatomy of the AGN in NGC 5548: VII. Swift study of obscuration and broadband continuum variability
M. Mehdipour, J. S. Kaastra, G. A. Kriss +16
We present our investigation into the long-term variability of the X-ray obscuration and optical-UV-X-ray continuum in the Seyfert 1 galaxy NGC 5548. In 2013 and 2014, the Swift ob…
HST/COS observations of the newly discovered obscuring outflow in NGC 3783
G. A. Kriss, M. Mehdipour, J. S. Kaastra +24
To understand the nature of transient obscuring outflows in active galactic nuclei, we observed the Seyfert 1 galaxy NGC 3783 on two occasions in December 2016 triggered by Swift m…
X-ray imaging of the ionisation cones in NGC 5252
M. Dadina, M. Guainazzi, M. Cappi +4
The physical conditions of the gas forming the narrow line regions (NLR) in active galactic nuclei (AGN) have been extensively studied in the optical band. We take advantage of the…
Multi-wavelength campaign on NGC 7469 V. Analysis of the HST/COS observations: Super solar metallicity, distance, and trough variation models
N. Arav, X. Xu, G. A. Kriss +18
Aims. Our aim is to determine the distance of the UV outflow components from the central source, their abundances and total column density, and the mechanism responsible for their…
Variable X-ray Absorption in mini-BAL QSOs
M. Giustini, M. Cappi, G. Chartas +3
We present the results of X-ray spectral analysis of two mini-BAL QSOs, PG 1126-041 and PG 1351+640, aimed at getting insights into the physics of quasar outflows. We find strong X…
XMM-NEWTON Observation of the Seyfert 2 Galaxy NGC 4138
L. Foschini, F. Panessa, A. L. Longinotti +9
The XMM-Newton data presented here are the first X-ray observation of the Seyfert 2 galaxy NGC4138. Although the galaxy has been pointed by ROSAT-HRI, it was not detected, with a f…
Probing variability patterns of the Fe K line complex in bright nearby AGNs
B. De Marco, K. Iwasawa, M. Cappi +5
The unprecedented sensitivity of current X-ray telescopes allows for the first time to address the issue of the Fe K line complex variability patterns in bright, nearby AGNs. We ex…
BeppoSAX/PDS identification of the true counterpart of the Piccinotti source H0917-074
A. Malizia, G. Malaguti, L. Bassani +5
High energy emission has been discovered serendipitously by the BeppoSAX/PDS telescope in the ~1.3 degree field of view around the Piccinotti source H0917-074. A re-pointing of Bep…
IRAS 13197-1627 has them all: Compton-thin absorption, photo-ionized gas, thermal plasmas, and a broad Fe line
G. Miniutti, G. Ponti, M. Dadina +2
We report results from the XMM-Newton observation of IRAS 13197-1627, a luminous IR galaxy with a Seyfert 1.8 nucleus. The hard X-ray spectrum is steep and is absorbed by Compton-t…
Probing the hard X-ray properties of high-redshift Radio-Quiet Quasars with ASCA
C. Vignali, A. Comastri, M. Cappi +3
This paper reports the X-ray spectral analysis of 5 high-redshift (z \ge 2) radio-quiet quasars observed by ASCA. A simple power law continuum plus cold Galactic absorption model w…
FERO: Finding Extreme Relativistic Objects. I. Statistics of Relativistic Fe Kalpha lines in Radio-Quiet Type 1 AGN
I. de la Calle Pérez, A. L. Longinotti, M. Guainazzi +10
Accretion models predict that fluorescence lines broadened by relativistic effects should arise from reflection of X-ray emission onto the inner region of the accretion disc surrou…
The Hot and Energetic Universe: Astrophysics of feedback in local AGN
M. Cappi, C. Done, E. Behar +30
Understanding the astrophysics of feedback in active galactic nuclei (AGN) is key to understanding the growth and co-evolution of supermassive black holes and galaxies. AGN-driven…
BeppoSAX view of NGC 526A: a Seyfert 1.9 galaxy with a flat spectrum
R. Landi, L. Bassani, G. Malaguti +8
In the present work we report the BeppoSAX observation of the Seyfert 1.9 galaxy NGC 526A in the band 0.1-150 keV. The high energy instrument onboard, PDS, has succeeded in measuri…
Evidence for ultra-fast outflows in radio-quiet AGNs: II - detailed photo-ionization modeling of Fe K-shell absorption lines
F. Tombesi, M. Cappi, J. N. Reeves +3
X-ray absorption line spectroscopy has recently shown evidence for previously unknown Ultra-fast Outflows (UFOs) in radio-quiet AGNs. In the previous paper of this series we define…
XMM-Newton study of the complex and variable spectrum of NGC 4051
G. Ponti, G. Miniutti, M. Cappi +3
We study the X-ray spectral variability of the Narrow Line Seyfert 1 galaxy NGC 4051 as observed during two XMM-Newton observations. The data show evidence for a neutral and consta…
Multiwavelength campaign on Mrk 509. V. Chandra-LETGS observation of the ionized absorber
J. Ebrero, G. A. Kriss, J. S. Kaastra +11
We present here the results of a 180 ks Chandra-LETGS observation as part of a large multi-wavelength campaign on Mrk 509. We study the warm absorber in Mrk 509 and use the data fr…
ASCA observations of high redshift quasars
J. Siebert, M. Matsuoka, W. Brinkmann +3
ASCA observations of 4 high redshift radio--loud quasars with 1.44z3.21 are presented. The spectral analysis for three of them (PKS 0332-403, PKS 0537-286, PKS 2149-306) reve…
The X-ray Halo Scaling Relations of Supermassive Black Holes
M. Gaspari, D. Eckert, S. Ettori +13
We carry out a comprehensive Bayesian correlation analysis between hot halos and direct masses of supermassive black holes (SMBHs), by retrieving the X-ray plasma properties (tempe…
An RXTE Observation of NGC 6300: a new bright Compton reflection Dominated Seyfert 2 Galaxy
K. M. Leighly, J. P. Halpern, H. Awaki +3
Scanning and pointed RXTE observations of the nearby Seyfert 2 galaxy NGC 6300 reveal that it is a source of hard X-ray continuum and large equivalent width Fe K emission. Thes…
Evidence for ultra-fast outflows in radio-quiet AGNs: III - location and energetics
F. Tombesi, M. Cappi, J. N. Reeves +1
Using the results of a previous X-ray photo-ionization modelling of blue-shifted Fe K absorption lines on a sample of 42 local radio-quiet AGNs observed with XMM-Newton, in this le…
The nature of the "Composite" Seyfert/Star-forming Galaxies
F. Panessa, M. Cappi, L. Bassani +6
We present the results obtained with BeppoSAX observations of the three Composite Seyfert/star-forming galaxies: IRAS 20051-1117, IRAS 04392-0123 and IRAS 01072+4954. These sources…
Multiwavelength campaign on Mrk 509. I. Variability and spectral energy distribution
J. S. Kaastra, P. -O. Petrucci, M. Cappi +23
(Abridged) Active galactic nuclei show a wealth of interesting physical processes, some of which are poorly understood. We want to address a number of open questions, including the…
XEUS - The X-ray Evolving Universe Spectroscopy Mission
A. N. Parmar, T. Peacock, M. Bavdaz +19
XEUS is under study by ESA as part of the Horizon 2000+ program to utilize the International Space Station (ISS) for astronomical applications. XEUS will be a long-term X-ray obser…
Highly Ionized Warm Absorbers in AGNs: Simulations with the IXO Calorimeter
F. Tombesi, M. Cappi, T. Yaqoob +2
We have performed several simulations in order to test the scientific capabilities of the IXO calorimeter, with particular emphasis on the detection of absorption lines in the 3-11…
VSTPOL: making the VST a large survey telescope for optical polarimetry
P. Schipani, S. Covino, F. Snik +30
Since the start of operations in 2011, the VLT Survey Telescope (VST) has been one of the most efficient wide-field imagers in the optical bands. However, in the next years the Ver…
Multiwavelength campaign on Mrk 509. VI. HST/COS observations of the far-ultraviolet spectrum
G. A. Kriss, N. Arav, J. S. Kaastra +15
We present medium resolution (R~20,000) HST/COS ultraviolet spectra covering 1155-1760 A of the Seyfert 1 Mrk 509 obtained simultaneously with a Chandra/LETGS spectrum as part of a…
The soft excess of the NLS1 galaxy Mrk 359 studied with an XMM-Newton-NuSTAR monitoring campaign
R. Middei, P. -O. Petrucci, S. Bianchi +7
XMM-Newton and NuSTAR multiple exposures allow us to disentangle the different emission components of active galactic nuclei (AGNs) and to study the evolution of their different sp…
Linking Macro, Meso, and Micro Scales in Multiphase AGN Feeding and Feedback
M. Gaspari, F. Tombesi, M. Cappi
Supermassive black hole (SMBH) feeding and feedback processes are often considered as disjoint and studied independently at different scales, both in observations and simulations.…
Accretion, ejection and reprocessing in supermassive black holes
A. De Rosa, S. Bianchi, M. Giroletti +35
This is a White Paper in support of the mission concept of the Large Observatory for X-ray Timing (LOFT), proposed as a medium-sized ESA mission. We discuss the potential of LOFT f…
Variability of the Fe K line relativistic component in a sample of Seyfert 1 galaxies
B. De Marco, M. Cappi, M. Dadina +1
We present the analysis of X-ray spectral varability made on a sample of 7 Seyfert 1 bright galaxies, using XMM-Newton data. From the "XMM-Newton Science Archive" we selected those…
The Array Control and Data Acquisition software of the Cherenkov Telescope Array Observatory
I. Oya, B. López, P. Aubert +61
The Cherenkov Telescope Array Observatory (CTAO) aims to advance knowledge of the gamma-ray sky as the largest gamma-ray observatory ever built. The CTAO will be deployed at two si…
Chandra study of an overdensity of X-ray sources around two distant (z~0.5) clusters
M. Cappi, P. Mazzotta, M. Elvis +21
We present results from a Chandra X-ray Observatory study of the field X-ray source populations in 4 different observations: two high-redshift (z~0.5) clusters of galaxies 3C295 an…
Diffuse Thermal Emission from Very Hot Gas in Starburst Galaxies: Spectral Results
M. Cappi, M. Persic, S. Mariani +12
New BeppoSAX observations of the nearby archetypical starburst galaxies (SBGs) NGC253 and M82 are presented. The main observational result is the unambiguous evidence that the hard…
Multiwavelength campaign on Mrk 509 XII. Broad band spectral analysis
P. -O. Petrucci, S. Paltani, J. Malzac +12
(Abridged) The simultaneous UV to X-rays/gamma rays data obtained during the multi-wavelength XMM/INTEGRAL campaign on the Seyfert 1 Mrk 509 are used in this paper and tested again…
Supermassive Black Hole Winds in X-rays: SUBWAYS. II. HST UV spectroscopy of winds at intermediate redshifts
M. Mehdipour, G. A. Kriss, M. Brusa +35
We present a UV spectroscopic study of ionized outflows in 21 active galactic nuclei (AGN), observed with the HST. The targets of the SUBWAYS sample were selected with the aim to p…
An XMM-Newton Study of Hard X-ray Sources
E. Piconcelli, L. Bassani, M. Cappi +3
We briefly report on an on-going spectroscopic study of hard X-ray sources selected serendipitously in 12 XMM-Newton fields. Results for the analysis of the 41 sources from the fir…
First Results from a XMM-Newton Survey of a Distance-Limited (D < 22 Mpc) Sample of Seyfert Galaxies. II - The Galactic Serendipitous Sources
L. Foschini, G. Di Cocco, M. Dadina +9
We present preliminary results from a study with XMM-Newton of the galactic serendipitous sources in a sample of 28 nearby Seyfert galaxies (with D < 22 Mpc). We concentrate here o…
Time lags in the ultraluminous X-ray source NGC 5408 X-1: implications for the black hole mass
B. De Marco, G. Ponti, G. Miniutti +4
We present the analysis of the X-ray variability and spectral timing properties of the ultraluminous X-ray source (ULX) NGC 5408 X-1, one of the most variable ULXs known so far. Th…
A deep look at the inner regions of the mini-BAL QSO PG 1126-041 with XMM-Newton
M. Giustini, M. Cappi, G. Chartas +3
A long XMM-Newton observation of the mini-BAL QSO PG 1126-041 allowed us to detect a highly ionized phase of X-ray absorbing gas outflowing at v~15000 km/s. Physical implications a…
BeppoSAX Observations of Bright Seyfert 2 Galaxies: Measuring the Intrinsic Continuum Emission
L. Bassani, M. Cappi, G. Malaguti +19
We report broad band (0.1-200 keV) X-ray observations, made by BeppoSAX, of a sample of bright Seyfert 2 galaxies: NGC7172, NGC2110, NGC4507, Mkn 3 and NGC7674. These spectra provi…
Coordinated X-ray and UV absorption within the accretion disk wind of the active galactic nucleus PG 1126-041
M. Giustini, P. RodrÃguez Hidalgo, J. N. Reeves +14
Accretion disk winds launched close to supermassive black holes (SMBHs) are a viable mechanism to provide feedback between the SMBH and the host galaxy. We aim to characterize the…
XMM-Newton reveals a Seyfert-like X-ray spectrum in the z=3.6 QSO B1422+231
M. Dadina, C. Vignali, M. Cappi +5
Matter flows in the central regions of quasars during their active phases are probably responsible for the properties of the super-massive black holes and that of the bulges of hos…
NuSTAR reveals the extreme properties of the super-Eddington accreting SMBH in PG 1247+267
G. Lanzuisi, M. Perna, A. Comastri +26
PG1247+267 is one of the most luminous known quasars at and is a strongly super-Eddington accreting SMBH candidate. We obtained NuSTAR data of this intriguing source in De…
An XMM-Newton Survey of Ultra-Luminous Infrared Galaxies
V. Braito, A. Franceschini, R. Della Ceca +8
We present preliminary results of XMM-Newton observations of 5 Ultra-luminous Infrared Galaxies (ULIRGs), part of a mini-survey program dedicated to 10 ULIRGs selected from the bri…
Characterizing the UV and X-ray Outflow in Mrk 509
G. A. Kriss, N. Arav, J. S. Kaastra +15
We observed Mrk 509 during the fall of 2009 during a multiwavelength campaign using XMM-Newton, Chandra, HST/COS, SWIFT, and Integral. The 600-ks XMM/RGS spectrum finds two kinemat…
The complex FeK line of the Narrow-Line Seyfert 1 galaxy IRAS13349+2438
A. L. Longinotti, M. Cappi, K. Nandra +3
The observation of the Narrow-Line Seyfert 1 galaxy IRAS13349+2438 performed by XMM-Newton European Photon Imaging Camera between 0.3-10 keV, is presented here. The broadband spect…
Unveiling the origin of XMM-Newton soft proton flares II. Systematics in the proton spectral analysis
T. Mineo, V. Fioretti, S. Lotti +7
Low-energy protons entering the field of view of the XMM-Newton telescope scatter with the X-ray mirror surface and might reach the X-ray detectors on the focal plane. They manifes…
KASHz+SUPER: Evidence of cold molecular gas depletion in AGN hosts at cosmic noon
E. Bertola, C. Circosta, M. Ginolfi +32
The energy released by AGN has the potential to heat or remove the gas of the ISM, thus likely impacting the cold molecular gas reservoir of host galaxies at first, with star forma…
X-Ray Sources Overdensity Around the 3C 295 Galaxy Cluster
V. D'Elia, F. Fiore, M. Elvis +4
We present a statistical analysis of the Chandra observation of the source field around the 3C 295 galaxy cluster (). The logN-logS of this field is in good agreement with…
Mapping the inner regions of MCG-6-30-15 with XMM-Newton
G. Ponti, M. Cappi, M. Dadina +1
Timing analysis of a ~95 ks long XMM-Newton observation of the Seyfert 1 galaxy MCG-6-30-15 is presented. Model-independent tools have been used with the intent of resolving the di…
X-Ray Sources Overdensity Around 3C 295
V. D'Elia, F. Fiore, M. Elvis +4
We present a statistical analysis of the Chandra observation of the source field around the 3C 295 galaxy cluster (). Three different methods of analysis, namely a chip by…
Multi-wavelength and black hole mass properties of Low Luminosity Active Nuclei
F. Panessa, L. Bassani, M. Cappi +6
We investigate the relation between the X-ray nuclear emission, optical emission line, radio luminosity and black hole mass for a sample of nearby Seyfert galaxies. Strong linear c…
Testing warm Comptonization models for the origin of the soft X-ray excess in AGN
P. O. Petrucci, F. Ursini, A. De Rosa +5
The X-ray spectra of many active galactic nuclei (AGN) show a soft X-ray excess below 1-2 keV on top of the extrapolated high- energy power law. The origin of this component is unc…
BeppoSAX observations of bright Seyfert 2 galaxies
L. Bassani, M. Cappi, G. Malaguti
We report on BeppoSAX broad band (0.1-100 keV) observations of bright Seyfert 2 galaxies and discuss the results in the framework of the unified theory of AGNs. The data are used t…
Unveiling the AGN powering the "Composite" Seyfert/Star-forming galaxy NGC 7679: BeppoSAX and ASCA results
R. Della Ceca, S. Pellegrini, L. Bassani +5
We discuss BeppoSAX observations and archive ASCA data of NGC 7679, a nearby, nearly face-on SB0 galaxy in which starburst and AGN activities coexist. The X-ray observations reveal…
Chasing obscuration in type-I AGN: discovery of an eclipsing clumpy wind at the outer broad-line region of NGC 3783
M. Mehdipour, J. S. Kaastra, G. A. Kriss +21
In 2016 we carried out a Swift monitoring program to track the X-ray hardness variability of eight type-I AGN over a year. The purpose of this monitoring was to find intense obscur…
High-energy monitoring of NGC 4593 II. Broadband spectral analysis: testing the two-corona model
R. Middei, S. Bianchi, P. -O. Petrucci +9
It is widely believed that the primary X-ray emission of AGN is due to the Comptonisation of optical-UV photons from a hot electron corona, while the origin of the 'soft-excess' is…
The Hot and Energetic Universe: Understanding the build-up of supermassive black holes and galaxies at the heyday of the Universe
A. Georgakakis, F. Carrera, G. Lanzuisi +19
Observations in the last decade have provided strong evidence that the growth of supermassive black holes at the centres of galaxies is among the most influential processes in gala…
XMM-Newton and Suzaku analysis of the Fe K complex in the Seyfert 1 galaxy Mrk 509
G. Ponti, M. Cappi, C. Vignali +11
We report on partially overlapping XMM-Newton (~260 ks) and Suzaku (~100 ks) observations of the iron K band in the nearby, bright Seyfert 1 galaxy Mrk 509. The source shows a reso…
Have we detected the most luminous ULX so far?
G. Miniutti, G. Ponti, M. Dadina +4
We report the XMM-Newton detection of a moderately bright X-ray source superimposed on the outer arms of the inactive spiral galaxy MCG-03-34-63 (z=0.0213). It is clearly offset fr…
Short time-scale X-ray spectral variability in the Seyfert 1 galaxy NGC 3783
D. Costanzo, M. Dadina, C. Vignali +9
We report on the X-ray time resolved spectral analysis of XMM-Newton observations of NGC 3783. The main goal is to detect transient features in the Fe K line complex, in order to s…
Multiwavelength campaign on Mrk 509. XIII. Testing ionized-reflection models on Mrk 509
R. Boissay, S. Paltani, G. Ponti +12
Active Galactic Nuclei (AGN) are the most luminous persistent objects in the universe. An excess of X-ray emission below about 2 keV, called soft-excess, is very common in Type 1 A…
Anatomy of the AGN in NGC 5548 IV. The short-term variability of the outflows
L. Di Gesu, E. Costantini, J. Ebrero +16
During an extensive multiwavelength campaign that we performed in 2013-14 the prototypical Seyfert 1 galaxy NGC 5548 has been found in an unusual condition of heavy and persistent…
Is XRISM/Resolve probing a "raining" absorber in Mrk 509?
M. Dadina, V. Missaglia, V. Braito +19
X-ray spectroscopy of AGN offers unique insights into the reprocessing of radiationand gas dynamics near SMBH. The Sey 1 galaxy Mrk 509 is an ideal laboratory for these studies sin…
Transient obscuration event captured in NGC 3227. I. Continuum model for the broadband spectral energy distribution
M. Mehdipour, G. A. Kriss, J. S. Kaastra +21
From Swift monitoring of a sample of active galactic nuclei (AGN) we found a transient X-ray obscuration event in Seyfert-1 galaxy NGC 3227, and thus triggered our joint XMM-Newton…
XMM-Newton unveils the type 2 nature of the BLRG 3C 445
P. Grandi, M. Guainazzi, M. Cappi +1
We present an observation of XMM-Newton that unambiguously reveals the ``Seyfert 2'' nature of the Broad Line Radio Galaxy 3C 445. For the first time the soft excess of this source…
Multiwavelength campaign on Mrk 509 XV. A global modeling of the broad emission lines in the Optical, UV and X-ray bands
E. Costantini, G. Kriss, J. S. Kaastra +11
We model the broad emission lines present in the optical, UV and X-ray spectra of Mrk 509, a bright type 1 Seyfert galaxy. The broad lines were simultaneously observed during a lar…
Discovery of a relation between black hole mass and soft X-ray time lags in active galactic nuclei
B. De Marco, G. Ponti, M. Cappi +5
We carried out a systematic analysis of time lags between X-ray energy bands in a large sample (32 sources) of unabsorbed, radio quiet active galactic nuclei (AGN), observed by XMM…
The 500 ks Chandra observation of the z = 6.31 QSO SDSS J1030+0524
R. Nanni, R. Gilli, C. Vignali +23
We present the results from a ks Chandra observation of the QSO SDSS J1030+0524. This is the deepest X-ray observation to date of a QSO. The QSO is dete…
High-energy monitoring of NGC 4593 with XMM-Newton and NuSTAR. X-ray spectral analysis
F. Ursini, P. -O. Petrucci, G. Matt +8
We present results from a joint Xmm-Newton/NuSTAR monitoring of the Seyfert 1 NGC 4593, consisting of 5x20 ks simultaneous observations spaced by two days, performed in January 201…
X-ray evidence for a mildly relativistic and variable outflow in the luminous Seyfert 1 galaxy Mrk509
M. Cappi, F. Tombesi, S. Bianchi +9
There is growing evidence for the presence of blueshifted Fe K absorption lines in a number of radio-quiet AGNs and QSOs. These may be fundamental to probe flow dynamics near super…