3 citations · 9 across the 12 of their papers we have counts for
13 papers
Supermassive Black Hole Winds in X-rays -- SUBWAYS. VI. Interplay between the soft X-ray excess and ultra-fast outflows
V. E. Gianolli, P-O. Petrucci, S. Bianchi +42
We present a broadband, multiwavelength study of the interplay between the soft X-ray excess (SE), ultra-fast outflows (UFOs), and warm absorbers (WAs) in 21 active galactic nuclei…
The hidden variability of the torus in local Active Galactic Nuclei: 20 years of Chandra, XMM-Newton, and NuSTAR observations
Vittoria Elvezia Gianolli, Nuria Torres-Alba, Stefano Marchesi +9
X-ray absorption variability in active galactic nuclei (AGN) provides key constraints on the structure and dynamics of the circumnuclear obscuring medium, the so-called torus. A fr…
Compton-thick AGN in the NuSTAR Era. XI. Analyzing 11 CT-AGN Candidates Selected with Machine Learning
Ross Silver, Nuria Torres-Alba, Stefano Marchesi +8
This work discusses the broadband X-ray spectral analysis of 11 candidate heavily-obscured active galactic nuclei (AGN) selected based on their infrared and X-ray properties by a r…
PACHA: Probing AGN Coronae with High-redshift AGN
Xiurui Zhao, Elias Kammoun, Marco Ajello +18
The X-ray emission of active galactic nuclei (AGN) is generally attributed to inverse Compton scattering of accretion-disk photons by hot electrons in a compact corona. In local AG…
Unveiling Obscured Accretion in the Local Universe
Indrani Pal, Stefano Marchesi, Ross Silver +9
Heavily obscured Active Galactic Nuclei (AGN), especially Compton-thick sources with line-of-sight column density () 10 cm, are critical to underst…
A systematic search for AGN obscuration variability in the Chandra archive
Isaiah S. Cox, Núria Torres-Albà, Stefano Marchesi +5
The nature of the obscuring material in active galactic nuclei (AGN) can be studied by measuring changes in the line-of-sight column density, , over time. This can b…
Contemporaneous X-ray and Optical Polarization of EHSP Blazar H 1426+428
Anuvab Banerjee, Akash Garg, Divya Rawat +17
We present the first contemporaneous X-ray and optical polarimetric measurement of the extremely high synchrotron peaked (EHSP) blazar H 1426+428. The X-ray polarimetric observatio…
X-ray polarization observations of NGC 2110 with IXPE
I. Pal, S. Marchesi, N. Torres-Albá +6
X-ray polarimetric observations from the Imaging X-ray Polarimeter Explorer (IXPE) is an excellent tool for probing the geometry and dynamics of X-ray emitting corona in active gal…
Swift-XRT and NuSTAR Monitoring of Obscuration Variability in Mrk 477
N. Torres-Albà, Z. Hu, I. Cox +6
We present the analysis of 15 X-ray observations of Mrk 477, a nearby Seyfert 2 active galactic nucleus, with the objective to monitor its obscuring column density variability. The…
Chandra Follow-up Observations of Swift-BAT-selected AGNs III
Isaiah S. Cox, Núria Torres-Albà, Stefano Marchesi +5
The cosmic X-ray background (CXB) is dominated by the obscured and unobscured coronal light of active galactic nuclei (AGN). At energies below 10 keV, the CXB can be well explained…
A Multi-Wavelength Characterization of the Obscuring Medium at the Center of NGC 6300
D. Sengupta, N. Torres-Albà, A. Pizzetti +9
Most of the super-massive black holes in the Universe accrete material in an obscured phase. While it is commonly accepted that the "dusty torus" is responsible for the nuclear obs…
Hydrogen Column Density Variability in a Sample of Local Compton-Thin AGN II
A. Pizzetti, N. Torres-Alba, S. Marchesi +7
We present the multi-epoch analysis of 13 variable, nearby (z<0.1), Compton-thin (22<logN_H<24) active galactic nuclei (AGN) selected from the 105-month BAT catalog. Analyzing all…
Revealing high-z Fermi-LAT BL Lacs using Swift and SARA data with photometric analysis
Y. Sheng, M. Rajagopal, A. Kaur +12
BL Lacertae (BL Lac) objects are a subclass of blazar, distinguished by their featureless optical spectrum. The featureless spectrum presents a challenge in measuring the redshift…