Results 1 to 10 of about 8,164 (262)

X-Ray Burst Sources [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1977
Since those reviews there have been very important new developments. First, a surprisingly new animal, GRO J1744—28 (better known as the Bursting Pulsar), made its debut in 1995. Second, but NOT last, in 1996/97 kHz pulsations were discovered in the persistent emission of several burst sources, and near coherent pulsations were detected in type I X-ray
Walter H. G. Lewin, Paul C. Joss
  +5 more sources

X-ray bursts [PDF]

open access: yesInternational Astronomical Union Colloquium, 1995
An X-ray burst is a sudden increase (rise time of order seconds) of the X-ray brightness of an X-ray source, which after reaching its peak decays, generally within a minute. The sky distribution of X-ray burst sources indicates that they are galactic objects (see Fig.
van Paradijs, J.A., Lewin, W.H.G.
openaire   +2 more sources

Thermonuclear X-ray Bursts [PDF]

open access: yes, 2020
Type-I X-ray bursts arise from unstable thermonuclear burning of accreted fuel on the surface of neutron stars. In this chapter we review the fundamental physics of the burning processes, and summarise the observational, numerical, and nuclear experimental progress over the preceding decade.
Galloway, Duncan K., Keek, Laurens
openaire   +2 more sources

Spectral Hardness and Evolution of Swift Gamma-Ray Bursts and X-Ray Afterglows

open access: yesThe Astrophysical Journal, 2023
Spectral hardness of gamma-ray bursts can be characterized by either hardness ratio or peak energy, and the inconsistency of these parameters can reflect spectral diversity and complexity.
X. Y. Du   +6 more
doaj   +1 more source

X-ray Bursts [PDF]

open access: yesHighlights of Astronomy, 1977
Most of the variable phenomena of high-luminosity (≳1036erg s−1) stellar X-ray sources can be explained, at least qualitatively, within the general framework of binary accretion models in which thermal X-rays are emitted in the vicinity of a neutron star or blackhole by plasma that has flowed downhill from the surface of a nuclear burning companion and
openaire   +2 more sources

X-Ray burst sources [PDF]

open access: yesInternational Astronomical Union Colloquium, 1986
AbstractType I cosmic X-ray bursts are widely thought to result from thermonuclear flashes in the surface layers of accreting neutron stars. The thermonuclear-flash model is able to account for a wide variety of observed burst phenomena. However, a number of theoretical and observational problems persist.
Fulvio Melia, Paul C. Joss
openaire   +1 more source

Statistical Properties of X-ray Flares in Gamma-ray Bursts

open access: yesUniverse, 2022
X-ray flares are frequently detected in the X-ray afterglow light curves and are highly correlated with the prompt emission of gamma-ray bursts (GRBs). We compile a comprehensive sample of X-ray flares up to 2021 April, comprising 697 flares. We classify
Yong-Rui Shi   +4 more
doaj   +1 more source

NICER Observations of Thermonuclear Bursts from 4U 1728-34: Detection of Oscillations prior to the Onset of Two Bursts

open access: yesThe Astrophysical Journal, 2023
We present temporal and time-resolved spectral analyses of all the thermonuclear X-ray bursts observed from the neutron star low-mass X-ray binary 4U 1728−34 with NICER from 2017 June to 2019 September.
Z. Funda Bostancı   +14 more
doaj   +1 more source

Scale invariance in x-ray flares of gamma-ray bursts

open access: yesPhysical Review Research, 2023
X-ray flares are generally believed to be produced by the reactivation of the central engine, and may have the same energy dissipation mechanism as the prompt emission of gamma-ray bursts (GRBs).
Jun-Jie Wei
doaj   +1 more source

Investigating Time Variability of X-Ray Absorption in Swift GRBs

open access: yesThe Astrophysical Journal, 2023
The existence of excess absorption in the X-ray spectra of GRBs is well known, but the primary location of the absorbing material is still uncertain. To gain more knowledge about this, we have performed a time-resolved analysis of the X-ray spectra of ...
Vlasta Valan   +2 more
doaj   +1 more source

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