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A NuSTAR View of GRS 1716249 in the Hard and Intermediate States
Jiachen Jiang, Felix Fürst, Dominic J. Walton +2
We present a detailed analysis of the spectral properties of the black hole transient GRS 1716-249, based on the archival Swift and NuSTAR observations taken during the outburst of…
Lessons learned from 19 years of high-resolution X-ray spectroscopy of galaxy clusters with RGS
C. Pinto, A. C. Fabian, J. S. Sanders +1
The intracluster medium (ICM) contains the vast majority of the baryonic matter in galaxy clusters and is heated to X-ray radiating temperatures. X-ray spectroscopy is therefore a…
Discovery of a soft X-ray lag in the Ultraluminous X-ray Source NGC 1313 X-1
E. Kara, C. Pinto, D. J. Walton +14
Ultraluminous X-ray Sources (ULXs) provide a unique opportunities to probe the geometry and energetics of super-Eddington accretion. The radiative processes involved in super-Eddin…
Astrophysical Black Holes
Andrew C. Fabian, Anthony N. Lasenby
Black holes are a common feature of the Universe. They are observed as stellar mass black holes spread throughout galaxies and as supermassive objects in their centres. Observation…
The Unusual Broadband X-ray Spectral Variability of NGC 1313 X-1 seen with XMMNewton, Chandra and NuSTAR
D. J. Walton, C. Pinto, M. Nowak +19
We present results from the major coordinated X-ray observing program on the ULX NGC 1313 X-1 performed in 2017, combining -, and , focusing on the e…
XMM-Newton Campaign On Ultraluminous X-ray Source NGC 1313 X-1: Wind vs. State Variability
C. Pinto, D. J. Walton, E. Kara +12
Most ultraluminous X-ray sources (ULXs) are thought to be powered by neutron stars and black holes accreting beyond the Eddington limit. If the compact object is a black hole or a…
X-ray Observations of Luminous Dusty Quasars at z > 2
G. B. Lansbury, M. Banerji, A. C. Fabian +1
We present new X-ray observations of luminous heavily dust-reddened quasars (HRQs) selected from infrared sky surveys. HRQs appear to be a dominant population at high redshifts and…
An evolving broad iron line from the first Galactic ultraluminous X-ray pulsar Swift J0243.6+6124
Gaurava K. Jaisawal, Colleen A. Wilson-Hodge, Andrew C. Fabian +15
We present a spectral study of the ultraluminous Be/X-ray transient pulsar Swift J0243.6+6124 using Neutron Star Interior Composition Explorer (NICER) observations during the syste…
MAXI J1820+070 with NuSTAR I. An increase in variability frequency but a stable reflection spectrum: coronal properties and implications for the inner disc in black hole binaries
D. J. K. Buisson, A. C. Fabian, D. Barret +10
MAXI J1820+070 (optical counterpart ASASSN-18ey) is a black hole candidate discovered through its recent very bright outburst. The low extinction column and long duration at high f…
High Density Reflection Spectroscopy: II. the Density of the Inner Black Hole Accretion Disc in AGN
Jiachen Jiang, Andrew C. Fabian, Thomas Dauser +7
We present a high density disc reflection spectral analysis of a sample of 17 Seyfert 1 galaxies to study the inner disc densities at different black hole mass scales and accretion…
The 2017 Failed Outburst of GX 339-4: Relativistic X-ray Reflection near the Black Hole Revealed by NuSTAR and Swift Spectroscopy
Javier A. García, John A. Tomsick, Navin Sridhar +12
We report on the spectroscopic analysis of the black hole binary GX 339-4 during its recent 2017-2018 outburst, observed simultaneously by the Swift and NuSTAR observatories. Altho…
Observations of the Ultra-compact X-ray Binary 4U 1543-624 in Outburst with NICER, INTEGRAL, Swift, and ATCA
R. M. Ludlam, L. Shishkovsky, P. M. Bult +17
We report on X-ray and radio observations of the ultra-compact X-ray binary 4U 1543-624 taken in August 2017 during an enhanced accretion episode. We obtained NICER monitoring of t…
The X-ray Coronae of two massive galaxies in the core of the Perseus cluster
N. Arakawa, A. C. Fabian, S. A. Walker
We study the X-ray properties of two elliptical galaxies, NGC 1270 and NGC 1272, in the core of the Perseus cluster with deep Chandra observations. Both galaxies have central super…
Supermassive Black Hole Feedback
Mateusz Ruszkowski, Daisuke Nagai, Irina Zhuravleva +23
Understanding the processes that drive galaxy formation and shape the observed properties of galaxies is one of the most interesting and challenging frontier problems of modern ast…
Probing the Black Hole Engine with Measurements of the Relativistic X-ray Reflection Component
Javier A. García, Matteo Bachetti, David R. Ballantyne +21
Over the last decades X-ray spectroscopy has proven to be a powerful tool for the estimation of black hole spin and several other key parameters in dozens of AGN and black hole X-r…
The Advanced X-ray Imaging Satellite
Richard F. Mushotzky, James Aird, Amy J. Barger +41
Much of the baryonic matter in the Universe, including the most active and luminous sources, are best studied in the X-ray band. Key advances in X-ray optics and detectors have pav…
Probing the Physical Properties of the Corona in Accreting Black Holes
Nikita Kamraj, Andrew Fabian, Anne Lohfink +3
The corona is a key component of most luminous accreting black holes, carrying 5 - 30 % of the power and in non-jetted Active Galactic Nuclei (AGN), creating all the X-ray emission…
Searching for cool and cooling X-ray emitting gas in 45 galaxy clusters and groups
Haonan Liu, Ciro Pinto, Andrew C. Fabian +2
We present a spectral analysis of cool and cooling gas in 45 cool-core clusters and groups of galaxies obtained from Reflection Grating Spectrometer (RGS) XMM- observations…
Evidence for an emerging disc wind and collimated outflow during an X-ray flare in the narrow-line Seyfert 1 galaxy Mrk 335
L. C. Gallo, A. G. Gonzalez, S. G. H. Waddell +13
A triggered 140 ks XMM-Newton observation of the narrow-line Seyfert 1 (NLS1) Mrk 335 in December 2015 caught the active galaxy at its lowest X-ray flux since 2007. The NLS1 is rel…
General Physical Properties of Gamma-ray Emitting Narrow-Line Seyfert 1 Galaxies
Vaidehi S. Paliya, M. L. Parker, J. Jiang +4
We present the results of a detailed multi-wavelength study of a sample of sixteen narrow-line Seyfert 1 (NLSy1) galaxies known in -rays so far. This includes a focused X-ray sp…
The corona contracts in a black-hole transient
E. Kara, J. F. Steiner, A. C. Fabian +11
The geometry of the accretion flow around stellar-mass black holes can change on timescales of days to months. When a black hole emerges from quiescence (that is, it "turns on" aft…
High Density Reflection Spectroscopy I. A case study of GX~339-4
Jiachen Jiang, Andrew C. Fabian, Jingyi Wang +5
We present a broad band spectral analysis of the black hole binary GX~339-4 with NuSTAR and Swift using high density reflection model. The observations were taken when the source w…