47 citations · 178 across the 14 of their papers we have counts for
12 papers · 1 filter
Hybrid corona and transient soft X-ray lags in Fairall 9
K. Khanthasombat, P. Chainakun, W. Luangtip +2
Fairall 9 is among the most massive Seyfert galaxies exhibiting a strong soft X-ray excess, but it is challenging to probe soft X-ray reverberation lags (if any) due to the long in…
The Broadband View of the Bare Seyfert PG 1426+015: Relativistic Reflection, the Soft Excess and the Importance of Oxygen
D. J. Walton, A. Madathil-Pottayil, P. Kosec +8
We present results from a deep, coordinated - + observation of the type 1 Seyfert PG 1426+015, a source of particular interest as the most massive reverberati…
A Hot Mess: The Rich and Complex Soft Emitting Regions Surrounding the Reflection Dominated Flaring Central Engine of Mrk 1239
Margaret Z. Buhariwalla, L. C. Gallo, J. Mao +5
Previous X-ray works on Mrk 1239 have revealed a complex Narrow Line Seyfert 1 (NLS1) that exhibits substantial absorption and strong emission from both collisional (CIE) and photo…
The Collisional and Photoionized Plasma in the Polarized NLS1 galaxy Mrk 1239
Margaret Z. Buhariwalla, Luigi C. Gallo, J. Mao +4
Mrk 1239 is a highly polarized NLS1 in the optical band, whose keV spectrum has remained remarkably consistent over more than two decades of observation. Previous analysis…
A truncated inner disc in the Seyfert 1 galaxy WKK 4438
L. C. Gallo, M. Z. Buhariwalla, J. Jiang +2
Understanding if and when the accretion disc extends down to the innermost stable circular orbit (ISCO) is important since it is the fundamental assumption behind measuring black h…
The X-ray Disk/Wind Degeneracy in AGN
M. L. Parker, G. A. Matzeu, J. H. Matthews +4
Relativistic Fe K emission lines from accretion disks and from disk winds encode key information about black holes, and their accretion and feedback mechanisms. We show that these…
The nature of the extreme X-ray variability in the NLS1 1H 0707-495
M. L. Parker, W. N. Alston, L. Härer +11
We examine archival XMM-Newton data on the extremely variable narrow-line Seyfert 1 (NLS1) active galactic nucleus (AGN) 1H 0707-495. We construct fractional excess variance (Fvar)…
A systematic study of photoionized emission and warm absorption signatures of the NLS1 Mrk 335
H. Liu, M. L. Parker, J. Jiang +4
We present an analysis of all the archival high resolution spectra of the Narrow-line Seyfert 1 galaxy Mrk~335 obtained with Reflection Grating Spectrometer (RGS) on board \textit{…
Discovery of thermonuclear (Type I) X-ray bursts in the X-ray binary Swift J1858.6-0814 observed with NICER and NuSTAR
D. J. K. Buisson, D. Altamirano, P. Bult +22
Swift J1858.6-0814 is a recently discovered X-ray binary notable for extremely strong variability (by factors in soft X-rays) in its discovery state. We present the detectio…
Measuring the masses of magnetic white dwarfs: A NuSTAR Legacy Survey
A. W. Shaw, C. O. Heinke, K. Mukai +11
The hard X-ray spectrum of magnetic cataclysmic variables can be modelled to provide a measurement of white dwarf mass. This method is complementary to radial velocity measurements…
Blueshifted absorption lines from X-ray reflection in IRAS 13224-3809
A. C. Fabian, C. S. Reynolds, J. Jiang +17
We explore a disc origin for the highly-blueshifted, variable absorption lines seen in the X-ray spectrum of the Narrow Line Seyfert 1 galaxy IRAS13224-3809. The blueshift correspo…
Constraining the geometry of AGN outflows with reflection spectroscopy
M. L. Parker, D. J. K. Buisson, J. Jiang +4
We collate active galactic nuclei (AGN) with reported detections of both relativistic reflection and ultra-fast outflows. By comparing the inclination of the inner disc from reflec…