Results 91 to 100 of about 403,855 (253)

NICER, NuSTAR, and Insight-HXMT Views to Black Hole X-Ray Binary SLX 1746–331

open access: yesThe Astrophysical Journal Letters
We study the spectral and temporal properties of the black hole (BH) X-ray transient binary SLX 1746–331 during the 2023 outburst with NICER, NuSTAR, and Insight-HXMT observations.
Jing-Qiang Peng   +15 more
doaj   +1 more source

Ultraluminous X-ray binaries

open access: yes
Ultraluminous X-ray binaries have challenged our assumptions of extreme accretion rates in X-ray binaries, and impact other subfields of astronomy, such as cosmology, gravitational wave sources and supernovæ. Our understanding of ULXs has changed tremendously over the last 35 years, and we now know that ULXs can be powered by accreting neutron stars as
Dage, Kristen C., Kovlakas, Konstantinos
openaire   +2 more sources

Insight-HXMT, NICER, and NuSTAR Views to the Newly Discovered Black Hole X-Ray Binary Swift J151857.0–572147

open access: yesThe Astrophysical Journal Letters
The systematic properties are largely unknown for the black hole X-ray binary Swift J151857.0–572147 newly discovered in the 2024 outburst. The nature of a black hole can be completely defined by specifying the mass and dimensionless spin parameter ...
Jing-Qiang Peng   +12 more
doaj   +1 more source

Insight-HXMT observations of jet-like corona in a black hole X-ray binary MAXI J1820+070. [PDF]

open access: yesNat Commun, 2021
You B   +126 more
europepmc   +1 more source

Multi-wavelength properties of IGR J05007-7047 (LXP 38.55) and identification as a Be X-ray binary pulsar in the LMC

open access: yes, 2016
We report on the results of a $\sim$40 d multi-wavelength monitoring of the Be X-ray binary system IGR J05007-7047 (LXP 38.55). During that period the system was monitored in the X-rays using the Swift telescope and in the optical with multiple ...
Delvaux, C.   +4 more
core   +1 more source

An Optical Search for New Outbursting Low Mass X-Ray Binaries

open access: yesThe Astrophysical Journal
Transient low-mass X-ray binaries (LMXBs) are discovered largely by X-ray and gamma-ray all-sky monitors. The X-ray outburst is also accompanied by an optical brightening, which empirically can precede the detection of X-rays.
Yuankun Wang   +7 more
doaj   +1 more source

A ROSAT Survey of Contact Binary Stars

open access: yes, 2005
Contact binary stars are common variable stars which are all believed to emit relatively large fluxes of x-rays. In this work we combine a large new sample of contact binary stars derived from the ROTSE-I telescope with x-ray data from the ROSAT All-Sky ...
Hunsch M.   +5 more
core   +1 more source

X-Ray Polarized View of the Accretion Geometry in the X-Ray Binary Circinus X-1

open access: yesThe Astrophysical Journal Letters
Cir X-1 is a neutron star X-ray binary characterized by strong variations in flux during its eccentric ∼16.6 day orbit. There are also strong variations in the spectral state, and it has historically shown both atoll and Z state properties.
John Rankin   +103 more
doaj   +1 more source

Evidence for a Cyclotron Absorption Line and Spectral Transition in EXO 2030+375 during the 2021 Giant Outburst

open access: yesThe Astrophysical Journal
Based on Insight-HXMT observations of EXO 2030+375 during its 2021 giant outburst, we report the analysis of pulse variations and the broadband X-ray spectrum, and find the presence of a potential cyclotron resonant scattering feature (CRSF) with the ...
Wen Yang, Wei Wang, Prahlad R. Epili
doaj   +1 more source

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