Results 111 to 120 of about 1,327,251 (363)
Return of 4U 1730–22 after 49 yr Silence: The Outburst Properties Observed by NICER and Insight-HXMT
The Astrophysical Journal Letters, 2022 After 49 yr of quiescence, 4U 1730–22 became active and had two outbursts in 2021 and 2022; the onset and tail of the outbursts were observed by NICER, which give us a peerless opportunity to study the state transition and its underlying mechanism.
Yu-Peng Chen +12 more
doaj +1 more source
Monitoring the X-Ray Variability of Bright X-Ray Sources in M33
The Astrophysical JournalWe present a new five-epoch Chandra X-ray Observatory monitoring survey of the nearby spiral galaxy M33 which probes X-ray variability with time sampling between two weeks and four months.
Rebecca Kyer +10 more
doaj +1 more source
Synchrotron Radiation from Outer Space and the Chandra X-Ray Observatory [PDF]
arXiv, 2006 The universe provides numerous extremely interesting astrophysical sources of synchrotron X radiation. The Chandra X-ray Observatory and other X-ray missions provide powerful probes of these and other cosmic X-ray sources. Chandra is the X-ray component of NASA's Great Observatory Program which also includes the Hubble Space telescope, the Spitzer ...
arxiv
Bremsstrahlung and synchrotron hypotheses considered as possible mechanisms for galactic X-ray ...
Burbidge, G. R. +2 more
core +1 more source
Observations of ultraluminous X-ray sources
, 2010 Ultraluminous X-ray sources (ULXs), first observed ~30 years ago, have been argued as extreme stellar mass black hole binaries or a new class intermediate mass black hole.
Gladstone, Jeanette Claire
core +1 more source
Compact Stellar X-ray Sources in Normal Galaxies [PDF]
arXiv, 2003 This paper reviews recent results on populations of compact X-ray sources in galaxies, mostly based on Chandra and Newton-XMM work.
arxiv
Globular cluster X-ray sources [PDF]
, 2006 After a brief historical overview we discuss the luminous X-ray sources in globular clusters of our Galaxy. This is followed by an overview of the very luminous X-ray sources studied in globular clusters of 14 other galaxies, and a discussion of their formation and the relation to X-ray sources outside globular clusters.
Walter H. G. Lewin, Frank Verbunt
openaire +4 more sources
A Novel Stationary CT Scheme Based on High-Density X-Ray Sources Device
IEEE Access, 2020 With the introduction of cold electron sources such as nanotubes, X-ray sources became small in size so that many sources are installed in array to form stationary CT, which brings benefits of simplicity in mechanism and fast response.
Yiting Duan +3 more
doaj +1 more source
Surveys of X-Ray Sources [PDF]
Highlights of Astronomy, 1968 My assignment this afternoon is to review briefly the status of the observational work that has been accomplished since the last IAU discussion of X-ray astronomy which took place at the Liege Symposium 3 years ago. Essentially, the methods of observation have not changed in any significant way.
openaire +2 more sources
Return to the Forgotten Ultraluminous X-Ray Source: A Broadband NICER+NuSTAR Study of NGC 4190 ULX-1
The Astrophysical JournalWe observed the nearby and relatively understudied ultraluminous X-ray source (ULX) NGC 4190 ULX-1 jointly with Neutron Star Interior Composition Explorer (NICER) and NuSTAR to investigate its broadband spectrum, timing properties, and spectral variation
Hannah P. Earnshaw +9 more
doaj +1 more source