1.3k citations · 17.2k across the 252 of their papers we have counts for
12 papers · 2 filters
The First Swift Intensive AGN Accretion Disk Reverberation Mapping Survey
R. Edelson, J. Gelbord, E. Cackett +32
Swift intensive accretion disk reverberation mapping of four AGN yielded light curves sampled 200-350 times in 0.3-10 keV X-ray and six UV/optical bands. Uniform reduction an…
Reverberation Reveals the Truncated Disc in the Hard State of GX 339-4
Ra'ad D. Mahmoud, Chris Done, Barbara De Marco
The nature and geometry of the hard state in black hole binaries is controversial. The broadband continuum spectrum and fast variability properties can be explained in a model wher…
Line-driven disc wind in near-Eddington active galactic nuclei: decrease of mass accretion rate due to powerful outflow
Mariko Nomura, Ken Ohsuga, Chris Done
Based on recent X-ray observations, ultra-fast outflows from supermassive black holes are expected to have enough energy to dramatically affect their host galaxy but their launch a…
Detection of polarized gamma-ray emission from the Crab nebula with Hitomi Soft Gamma-ray Detector
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +191
We present the results from the Hitomi Soft Gamma-ray Detector (SGD) observation of the Crab nebula. The main part of SGD is a Compton camera, which in addition to being a spectrom…
X-ray reverberation lags of the Fe-K line due to AGN disc winds
Misaki Mizumoto, Ken Ebisawa, Masahiro Tsujimoto +3
Short X-ray reverberation lags are seen across a broad Fe-K energy band in more than twenty active galactic nuclei (AGNs). This broad iron line feature in the lag spectrum is most…
Time-Evolved X-ray Irradiation during the 19992000 Outburst of the Black-Hole Binary XTE J1859+226
Mariko Kimura, Chris Done
X-ray irradiation in X-ray binaries is thought to control the behavior at the outer disc, which is observable mainly at optical wavelengths. It is generally parameterized phenomeno…
X-ray short-time lags in the Fe-K energy band produced by scattering clouds in active galactic nuclei
Misaki Mizumoto, Chris Done, Kouichi Hagino +3
X-rays illuminating the accretion disc in active galactic nuclei give rise to an iron K line and its associated reflection spectrum which are lagged behind the continuum variabilit…
A physical model of the broadband continuum of AGN and its implications for the UV/X relation and optical variability
Aya Kubota, Chris Done
We develop a new spectral model for the broadband spectral energy distribution (SED) of Active Galactic Nuclei (AGN). This includes an outer standard disc, an inner warm Comptonisi…
Breaking the spectral degeneracies in black hole binaries with fast timing data
M. Axelsson, C. Done
The spectra of black hole binaries in the low/hard state are complex, with evidence for multiple different Comptonisation regions contributing to the hard X-rays in addition to a c…
A Physical Model for the Spectral-Timing Properties of Accreting Black Holes
Ra'ad D. Mahmoud, Chris Done
We develop new techniques to deconvolve the radial structure of the X-ray emission region in the bright low/hard state of the black hole Cygnus X-1 using both spectral and timing d…
Monte-Carlo simulations of the detailed iron absorption line profiles from thermal winds in X-ray binaries
Ryota Tomaru, Chris Done, Hirokazu Odaka +2
Blue shifted absorption lines from highly ionised iron are seen in some high inclination X-ray binary systems, indicating the presence of an equatorial disc wind. This launch mecha…
Hitomi X-ray Observation of the Pulsar Wind Nebula G21.50.9
Hitomi Collaboration, Felix Aharonian, Hiroki Akamatsu +194
We present results from the Hitomi X-ray observation of a young composite-type supernova remnant (SNR) G21.50.9, whose emission is dominated by the pulsar wind nebula (PWN) cont…