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THE ULTRALUMINOUS X-RAY SOURCE POPULATION FROM THE CHANDRA ARCHIVE OF GALAXIES
One hundred fifty-four discrete non-nuclear ultraluminous X-ray (ULX) sources, with spectroscopically determined intrinsic X-ray luminosities greater than 10 39 ergs s � 1 , are identified in 82
The γ-ray binary LS 5039: mass and orbit constraints from MOST observations
The results of a coordinated space-based photometric and ground-based spectroscopic observing campaign on the enigmatic γ -ray binary LS 5039 are reported. 16 d of observations from the MOST
Long-term X-ray variability of Swift J1644+57
We studied the X-ray timing and spectral variability of the X-ray source Sw J1644+57, a candidate for a tidal disruption event. We have separated the long-term trend (an initial decline followed by a
CHANDRA X-RAY OBSERVATIONS OF THE SPIRAL GALAXY M81
A Chandra X-Ray Observatory ACIS-S imaging observation is used to study the population of X-ray sources in the nearby Sab galaxy M81 (NGC 3031). A total of 177 sources are detected with 124 located
An ultra-relativistic outflow from a neutron star accreting gas from a companion
TLDR
The discovery of an ultra-relativistic outflow from a neutron star accreting gas within a binary stellar system is reported and it is concluded that the generation of highly relativisticOutflows does not require properties that are unique to black holes, such as an event horizon.
A Chandra Search for Coronal X Rays from the Cool White Dwarf GD 356
We report observations with the Chandra X-ray Observatory of the single, cool, magnetic white dwarf GD 356. For consistent comparison with other X-ray observations of single white dwarfs, we also
Probable intermediate-mass black holes in NGC 4559: XMM–Newton spectral and timing constraints
We have examined X-ray and optical observations of two ultraluminous X-ray sources, X7 and X10 in NGC 4559, using XMM-Newton, Chandra and the Hubble Space Telescope (HST). The ultraviolet/X-ray
X-ray sources in the starburst spiral galaxy M 83 - Nuclear region and discrete source population
Chandra has resolved the starburst nuclear region of the face-on grand-design spiral M 83. Eighty-one point sources are detected (above 3.5-σ) in the ACIS S3 image, and 15 of them are within the
White dwarf masses in magnetic cataclysmic variables: multi-temperature fits to Ginga data
One method of obtaining the mass of the white dwarf in magnetic cataclysmic variables (mCVs) is through their hard X-ray spectra. However, previous mass estimates using this method give lower limits
CHANDRA DISCOVERY OF LUMINOUS SUPERSOFT X-RAY SOURCES IN M81
A Chandra ACIS-S imaging observation of the nearby galaxy M81 (NGC 3031) reveals nine luminous soft X-ray sources. The local environments, X-ray spectral properties, and X-ray light curves of the
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