330 citations · 834 across the 14 of their papers we have counts for
14 papers
Drop in the hard pulsed fraction and a candidate cyclotron line in IGR J16320-4751 seen by NuSTAR
Arash Bodaghee, Alan J. -L. Chiu, John A. Tomsick +10
We report on a timing and spectral analysis of a 50-ks NuSTAR observation of IGR J16320-4751 (= AX J1631.9-4752); a high-mass X-ray binary hosting a slowly-rotating neutron star. I…
A new sample of transient ultraluminous X-ray sources serendipitously discovered by Swift/XRT
Murray Brightman, Jean-Marie Hameury, Jean-Pierre Lasota +11
Ultraluminous X-ray sources (ULXs) are our best laboratories for studying extreme super-Eddington accretion. Most studies of these objects are of relatively persistent sources, how…
Investigating the superorbital modulations in 4U 1909+07, IGR J16418-4532 and IGR J16479-4514 with Swift XRT, BAT and NuSTAR observations
Nazma Islam, Robin H. D. Corbet, Joel B. Coley +2
A puzzling variety of superorbital modulations have been discovered in several supergiant High-Mass X-ray binaries (sgHMXBs). To investigate the mechanisms driving these superorbit…
The long stare at Hercules X-1 -- I. Emission lines from the outer disk, the magnetosphere boundary and the accretion curtain
P. Kosec, E. Kara, A. C. Fabian +11
Hercules X-1 is a nearly edge-on accreting X-ray pulsar with a warped accretion disk, precessing with a period of about 35 days. The disk precession allows for unique and changing…
Evolution of the spin, spectrum and super-orbital period of the ultraluminous X-ray pulsar M51 ULX7
Murray Brightman, Matteo Bachetti, Hannah Earnshaw +6
M51 ULX7 is among a small group of known ultraluminous X-ray pulsars (ULXP). The neutron star powering the source has a spin period of 2.8s, orbits its companion star with a period…
Spectral and Timing Analysis of NuSTAR and Swift/XRT Observations of the X-Ray Transient MAXI J0637-430
Hadar Lazar, John A. Tomsick, Sean N. Pike +10
We present results for the first observed outburst from the transient X-ray binary source MAXI J0637-430. This study is based on eight observations from the Nuclear Spectroscopic T…
Discovery of coherent pulsations from the Ultraluminous X-ray Source NGC 7793 P13
F. Fuerst, D. J. Walton, F. A. Harrison +12
We report the detection of coherent pulsations from the ultraluminous X-ray source NGC 7793 P13. The ~0.42s nearly sinusoidal pulsations were initially discovered in broadband X-ra…
The Broadband Spectral Variability of Holmberg IX X-1
D. J. Walton, F. Fuerst, F. A. Harrison +9
We present results from four new broadband X-ray observations of the extreme ultraluminous X-ray source Holmberg IX X-1 ( erg/s), performed by and $N…
The NuSTAR X-ray Spectrum of Hercules X-1: A Radiation-Dominated Radiative Shock
Michael T. Wolff, Peter A. Becker, Amy M. Gottlieb +7
We report new spectral modeling of the accreting X-ray pulsar Hercules X- 1. Our radiation-dominated radiative shock model is an implementation of the analytic work of Becker & Wol…
Spectro-timing study of GX 339-4 in a hard intermediate state
F. Fuerst, V. Grinberg, J. A. Tomsick +16
We present an analysis of NuSTAR observations of a hard intermediate state of the transient black hole GX 339-4 taken in January 2015. As the source softened significantly over the…
Spectral and temporal properties of the ultra-luminous X-ray pulsar in M82 from 15 years of Chandra observations and analysis of the pulsed emission using NuSTAR
Murray Brightman, Fiona Harrison, Dominic J. Walton +8
The recent discovery by Bachetti et al. (2014) of a pulsar in M82 that can reach luminosities of up to 10^40 ergs s^-1, a factor of ~100 the Eddington luminosity for a 1.4 Msol com…
Characterizing X-ray and Radio emission in the Black Hole X-Ray Binary V404 Cygni during Quiescence
Vikram Rana, Alan Loh, Stephane Corbel +17
We present results from multi-wavelength simultaneous X-ray and radio observations of the black hole X-ray binary V404 Cyg in quiescence. Our coverage with NuSTAR provides the very…
The complex accretion geometry of GX 339-4 as seen by NuSTAR and Swift
F. Fuerst, M. A. Nowak, J. A. Tomsick +19
We present spectral analysis of five NuSTAR and Swift observations of GX 339-4 taken during a failed outburst in summer 2013. These observations cover Eddington luminosity fraction…
NuSTAR and Suzaku observations of the hard state in Cygnus X-1: locating the inner accretion disk
M. L. Parker, J. A. Tomsick, J. M. Miller +20
We present simultaneous Nuclear Spectroscopic Telescope Array (NuSTAR ) and Suzaku observations of the X-ray binary Cygnus X-1 in the hard state. This is the first time this state…