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A Detailed Look at a Trio of Changing-look Quasars: Spectral Energy Distributions and the Dust Extinction Test*
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Laura Duffy, Michael Eracleous, Jessie C. Runnoe, John J. Ruan, Scott F. Anderson, Sabrina Dimassimo, Paul Green and Stephanie LaMassa The Astrophysical Journal 981(2) 127 (2025) https://doi.org/10.3847/1538-4357/adae0b
Exploring the hardness of the ionizing radiation with the infrared softness diagram
E. Pérez-Montero, J. A. Fernández-Ontiveros, B. Pérez-Díaz, J. M. Vílchez and R. Amorín Astronomy & Astrophysics 696 A229 (2025) https://doi.org/10.1051/0004-6361/202453276
Tracking X-Ray Variability in Next-generation EHT Low-luminosity Active Galactic Nucleus Targets
Nicole M. Ford, Michael Nowak, Venkatessh Ramakrishnan, Daryl Haggard, Kristen Dage, Dhanya G. Nair and Chi-kwan Chan The Astrophysical Journal 981(2) 126 (2025) https://doi.org/10.3847/1538-4357/adae0f
The Close AGN Reference Survey (CARS)
T. Saha, M. Krumpe, A. Markowitz, M. Powell, G. Leung, F. Combes, R. E. McElroy, J. S. Elford, M. Gaspari, N. Winkel, A. L. Coil and T. Urrutia Astronomy & Astrophysics 699 A205 (2025) https://doi.org/10.1051/0004-6361/202554707
X-Ray Emission Properties of a Compact Symmetric Object Sample
The High-Energy X-ray Probe (HEX-P): the circum-nuclear environment of growing supermassive black holes
P. G. Boorman, N. Torres-Albà, A. Annuar, S. Marchesi, R. W. Pfeifle, D. Stern, F. Civano, M. Baloković, J. Buchner, C. Ricci, D. M. Alexander, W. N. Brandt, M. Brightman, C. T. Chen, S. Creech, P. Gandhi, J. A. García, F. Harrison, R. Hickox, E. Kammoun, S. LaMassa, G. Lanzuisi, L. Marcotulli, K. Madsen, G. Matt, et al. Frontiers in Astronomy and Space Sciences 11 (2024) https://doi.org/10.3389/fspas.2024.1335459
AGN feeding and feedback in M84: from kiloparsec scales to the Bondi radius
C J Bambic, H R Russell, C S Reynolds, A C Fabian, B R McNamara and P E J Nulsen Monthly Notices of the Royal Astronomical Society 522(3) 4374 (2023) https://doi.org/10.1093/mnras/stad824
NGC 4117: A New Compton-thick AGN Revealed by Broadband X-Ray Spectral Analysis
Multiwavelength scrutiny of X-ray sources in dwarf galaxies: ULXs versus AGNs
Erica Thygesen, Richard M Plotkin, Roberto Soria, Amy E Reines, Jenny E Greene, Gemma E Anderson, Vivienne F Baldassare, Milo G Owens, Ryan T Urquhart, Elena Gallo, James C A Miller-Jones, Jeremiah D Paul and Alexandar P Rollings Monthly Notices of the Royal Astronomical Society 519(4) 5848 (2023) https://doi.org/10.1093/mnras/stad002
Constraining the X-ray reflection in low accretion-rate active galactic nuclei using XMM-Newton, NuSTAR, and Swift
Coronal properties of low-accreting AGNs using Swift, XMM–Newton, and NuSTAR observations
Arghajit Jana, Arka Chatterjee, Hsiang-Kuang Chang, Prantik Nandi, K Rubinur, Neeraj Kumari, Sachindra Naik, Samar Safi-Harb and Claudio Ricci Monthly Notices of the Royal Astronomical Society 524(3) 4670 (2023) https://doi.org/10.1093/mnras/stad2140
Observational hints on the torus obscuring gas behaviour through X-rays with NuSTAR data
N Osorio-Clavijo, O González-Martín, S F Sánchez, et al. Monthly Notices of the Royal Astronomical Society 510(4) 5102 (2022) https://doi.org/10.1093/mnras/stab3752
Long-term and multiwavelength evolution of a changing-look AGN Mrk 1018
Bing Lyu, Zhen Yan, Wenfei Yu and Qingwen Wu Monthly Notices of the Royal Astronomical Society 506(3) 4188 (2021) https://doi.org/10.1093/mnras/stab1581
The 450 Day X-Ray Monitoring of the Changing-look AGN 1ES 1927+654
C. Ricci, M. Loewenstein, E. Kara, R. Remillard, B. Trakhtenbrot, I. Arcavi, K. C. Gendreau, Z. Arzoumanian, A. C. Fabian, R. Li, L. C. Ho, C. L. MacLeod, E. Cackett, D. Altamirano, P. Gandhi, P. Kosec, D. Pasham, J. Steiner and C.-H. Chan The Astrophysical Journal Supplement Series 255(1) 7 (2021) https://doi.org/10.3847/1538-4365/abe94b
Potential Black Hole Seeding of the Spiral Galaxy NGC 4424 via an Infalling Star Cluster
Alister W. Graham, Roberto Soria, Bogdan C. Ciambur, Benjamin L. Davis and Douglas A. Swartz The Astrophysical Journal 923(2) 146 (2021) https://doi.org/10.3847/1538-4357/ac235b
Coronal Properties of Black Hole X-Ray Binaries in the Hard State as Seen by NuSTAR and Swift
Constraining X-ray reflection in the low-luminosity AGN NGC 3718 using NuSTAR and XMM–Newton
Y Diaz, P Arévalo, L Hernández-García, et al. Monthly Notices of the Royal Astronomical Society 496(4) 5399 (2020) https://doi.org/10.1093/mnras/staa1762
The inner view of NGC 1052 using multiple X-ray observations
N Osorio-Clavijo, O González-Martín, I E Papadakis, J Masegosa and L Hernández-García Monthly Notices of the Royal Astronomical Society 491(1) 29 (2020) https://doi.org/10.1093/mnras/stz2785
A Hard Look at Local, Optically Selected, Obscured Seyfert Galaxies*
E. S. Kammoun, J. M. Miller, M. Koss, K. Oh, A. Zoghbi, R. F. Mushotzky, D. Barret, E. Behar, W. N. Brandt, L. W. Brenneman, J. S. Kaastra, A. M. Lohfink, D. Proga and D. Stern The Astrophysical Journal 901(2) 161 (2020) https://doi.org/10.3847/1538-4357/abb29f
X-Ray Spectral Shape Variation in Changing-look Seyfert Galaxy SDSS J155258+273728
Yanli Ai, Liming Dou, Chenwei Yang, Luming Sun, Fu-Guo Xie, Su Yao, Xue-Bing Wu, Tinggui Wang, Xinwen Shu and Ning Jiang The Astrophysical Journal Letters 890(2) L29 (2020) https://doi.org/10.3847/2041-8213/ab7306
The advection-dominated accretion flow for the anticorrelation between the X-ray photon index and the X-ray luminosity in neutron star low-mass X-ray binaries
Modeling the Strongest Silicate Emission Features of Local Type 1 AGNs
M. Martínez-Paredes, O. González-Martín, D. Esparza-Arredondo, M. Kim, A. Alonso-Herrero, Y. Krongold, T. Hoang, C. Ramos Almeida, I. Aretxaga, D. Dultzin and J. Hodgson The Astrophysical Journal 890(2) 152 (2020) https://doi.org/10.3847/1538-4357/ab6732
Chandra View of the LINER-type Nucleus in the Radio-loud Galaxy CGCG 292–057: Ionized Iron Line and Jet–ISM Interactions
K. Balasubramaniam, Ł. Stawarz, V. Marchenko, M. Sobolewska, C. C. Cheung, A. Siemiginowska, R. Thimmappa and E. Kosmaczewski The Astrophysical Journal 905(2) 148 (2020) https://doi.org/10.3847/1538-4357/abc4e2
The Analogous Structure of Accretion Flows in Supermassive and Stellar Mass Black Holes: New Insights from Faded Changing-look Quasars
John J. Ruan, Scott F. Anderson, Michael Eracleous, Paul J. Green, Daryl Haggard, Chelsea L. MacLeod, Jessie C. Runnoe and Malgosia A. Sobolewska The Astrophysical Journal 883(1) 76 (2019) https://doi.org/10.3847/1538-4357/ab3c1a
NuStar Hard X-Ray View of Low-luminosity Active Galactic Nuclei: High-energy Cutoff and Truncated Thin Disk
George Younes, Andrew Ptak, Luis C. Ho, Fu-Guo Xie, Yuichi Terasima, Feng Yuan, Daniela Huppenkothen and Mihoko Yukita The Astrophysical Journal 870(2) 73 (2019) https://doi.org/10.3847/1538-4357/aaf38b
Chandra Survey of Nearby Galaxies: Testing the Accretion Model for Low-luminosity AGNs
Variability-selected Low-luminosity Active Galactic Nuclei Candidates in the 7 Ms Chandra Deep Field-South
N. Ding, B. Luo, W. N. Brandt, M. Paolillo, G. Yang, B. D. Lehmer, O. Shemmer, D. P. Schneider, P. Tozzi, Y. Q. Xue, X. C. Zheng, Q. S. Gu, A. M. Koekemoer, C. Vignali, F. Vito and J. X. Wang The Astrophysical Journal 868(2) 88 (2018) https://doi.org/10.3847/1538-4357/aaea60
Origin of X-rays in the low state of the FSRQ 3C 273: evidence of inverse Compton emission
Nibedita Kalita, Alok C. Gupta, Paul J. Wiita, Gulab C. Dewangan and Kalpana Duorah Monthly Notices of the Royal Astronomical Society 469(4) 3824 (2017) https://doi.org/10.1093/mnras/stx1108
A jet-dominated model for a broad-band spectral energy distribution of the nearby low-luminosity active galactic nucleus in M94
Pieter van Oers, Sera Markoff, Phil Uttley, et al. Monthly Notices of the Royal Astronomical Society 468(1) 435 (2017) https://doi.org/10.1093/mnras/stx514
BAT AGN Spectroscopic Survey (BASS) – VI. The ΓX–L/LEdd relation
Benny Trakhtenbrot, Claudio Ricci, Michael J. Koss, et al. Monthly Notices of the Royal Astronomical Society 470(1) 800 (2017) https://doi.org/10.1093/mnras/stx1117
Detection of X-ray spectral state transitions in mini-outbursts of black hole transient GRS 1739−278
STUDY OF SWIFT/BAT SELECTED LOW-LUMINOSITY ACTIVE GALACTIC NUCLEI OBSERVED WITH SUZAKU
Taiki Kawamuro, Yoshihiro Ueda, Fumie Tazaki, Yuichi Terashima and Richard Mushotzky The Astrophysical Journal 831(1) 37 (2016) https://doi.org/10.3847/0004-637X/831/1/37
X-ray spectral properties of the AGN sample in the northern XMM-XXL field
Zhu Liu, Andrea Merloni, Antonis Georgakakis, et al. Monthly Notices of the Royal Astronomical Society 459(2) 1602 (2016) https://doi.org/10.1093/mnras/stw753
UNVEILING THE PHYSICS OF LOW-LUMINOSITY AGNs THROUGH X-RAY VARIABILITY: LINER VERSUS SEYFERT 2
THE WIND NEBULA AROUND MAGNETAR SWIFT J1834.9–0846
G. Younes, C. Kouveliotou, O. Kargaltsev, R. Gill, J. Granot, A. L. Watts, J. Gelfand, M. G. Baring, A. Harding, G. G. Pavlov, A. J. van der Horst, D. Huppenkothen, E. Göğüş, L. Lin and O. J. Roberts The Astrophysical Journal 824(2) 138 (2016) https://doi.org/10.3847/0004-637X/824/2/138
THE X-RAY PROPERTIES OF MILLION SOLAR MASS BLACK HOLES
Richard. M. Plotkin, Elena Gallo, Francesco Haardt, Brendan P. Miller, Callum J. L. Wood, Amy E. Reines, Jianfeng Wu and Jenny E. Greene The Astrophysical Journal 825(2) 139 (2016) https://doi.org/10.3847/0004-637X/825/2/139
Long-term X-ray spectral variability in AGN from the Palomar sample observed bySwift
S. D. Connolly, I. M. McHardy, C. J. Skipper and D. Emmanoulopoulos Monthly Notices of the Royal Astronomical Society 459(4) 3963 (2016) https://doi.org/10.1093/mnras/stw878
X-ray long-term variations in the low-luminosity AGN NGC 835 and its circumnuclear emission
A HARD X-RAY STUDY OF THE NORMAL STAR-FORMING GALAXY M83 WITH NuSTAR
M. Yukita, A. E. Hornschemeier, B. D. Lehmer, A. Ptak, D. R. Wik, A. Zezas, V. Antoniou, T. J. Maccarone, V. Replicon, J. B. Tyler, T. Venters, M. K. Argo, K. Bechtol, S. Boggs, F. E. Christensen, W. W. Craig, C. Hailey, F. Harrison, R. Krivonos, K. Kuntz, D. Stern and W. W. Zhang The Astrophysical Journal 824(2) 107 (2016) https://doi.org/10.3847/0004-637X/824/2/107
Revisit the Fundamental Plane of black hole activity from sub-Eddington to quiescent state
Correlation between the photon index and X-ray luminosity of black hole X-ray binaries and active galactic nuclei: observations and interpretation
Qi-Xiang Yang, Fu-Guo Xie, Feng Yuan, et al. Monthly Notices of the Royal Astronomical Society 447(2) 1692 (2015) https://doi.org/10.1093/mnras/stu2571
ON THE MERGING CLUSTER ABELL 578 AND ITS CENTRAL RADIO GALAXY 4C+67.13
The subarcsecond mid-infrared view of local active galactic nuclei – II. The mid-infrared–X-ray correlation
D. Asmus, P. Gandhi, S. F. Hönig, A. Smette and W. J. Duschl Monthly Notices of the Royal Astronomical Society 454(1) 766 (2015) https://doi.org/10.1093/mnras/stv1950
Fast Spectral Variability in the X-ray Emission of Accreting Black Holes
Constraining black hole masses in low-accreting active galactic nuclei using X-ray spectra
I. Jang, M. Gliozzi, C. Hughes and L. Titarchuk Monthly Notices of the Royal Astronomical Society 443(1) 72 (2014) https://doi.org/10.1093/mnras/stu1024
ARE X-RAY EMITTING CORONAE AROUND SUPERMASSIVE BLACK HOLES OUTFLOWING?
Josefa Masegosa, Lorena Hernández-García, Isabel Márquez and Omaira González-Martín Proceedings of the International Astronomical Union 9(S304) 399 (2013) https://doi.org/10.1017/S1743921314004402
THE X-RAY SPECTRAL EVOLUTION OF GALACTIC BLACK HOLE X-RAY BINARIES TOWARD QUIESCENCE
L. Hernández-García, O. González-Martín, J. Masegosa and I Márquez Proceedings of the International Astronomical Union 8(S290) 41 (2012) https://doi.org/10.1017/S1743921312019163
The ‘harder when brighter’ X-ray behaviour of the low-luminosity active galactic nucleus NGC 7213