Results 31 to 40 of about 191,283 (348)
X-ray Transient Sources (Multifrequency Laboratories) The Case of the Prototype A0535+26/HDE 245770
, 2011 The goal of this paper is to discuss the behaviour of the X-ray transient source A0535+26 which is considered for historical reasons and for the huge amount of multifrequency data, spread over a period of 35 years, as the prototype of this class of ...
F. Giovannelli, L. Sabau-Graziati
semanticscholar +1 more source
Precession in transient X-ray sources [PDF]
Nature, 1975 THE origin of both the relatively long period and the transient nature of the recently discovered X-ray sources Ariel 1118−61 (ref. 1) and Ariel 0535+26 (ref. 2), with pulse periods of about 405 and 104 s, respectively, and decay times of days, is unclear. The pulse rate of A1118−61 has been attributed to an extremely short binary star orbital period3,
openaire +1 more source
Variable gamma-ray emission from the Be/X-ray transient A0535+26? [PDF]
, 2001 We present a study of the unidentied gamma-ray source 3EG J0542+2610. This source is spatially superposed on the supernova remnant G180.0-1.7, but its time variability makes a physical link unlikely.
G. Romero +3 more
semanticscholar +1 more source
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
The Discovery Outburst of the X-Ray Transient IGR J17497–2821 Observed with RXTE and ATCA [PDF]
, 2006 We report the results of a series of RXTE and ATCA observations of the recently discovered X-ray transient IGR J17497-2821. Our 3-200 keV PCA+HEXTE spectral analysis shows very little variations over a period of ~10 days around the maximum of the ...
Jérôme Rodriguez +7 more
semanticscholar +1 more source
LINKING BURST-ONLY X-RAY BINARY SOURCES TO FAINT X-RAY TRANSIENTS [PDF]
The Astrophysical Journal, 2009 Burst-only sources are X-ray sources showing up only during short bursts but with no persistent emission (at least with the monitoring instrument which led to their discovery). These bursts have spectral characteristics consistent with thermonuclear (type I) burst from the neutron star surface, linking burst-only sources to neutron star X-ray binary ...
openaire +2 more sources
Discovery of the upper kilohertz quasi-periodic oscillation from the X-ray transient Aql X-1 [PDF]
, 2007 We report on a comprehensive analysis of the kilohertz (≥600 Hz) quasi-periodic oscillations (kHz QPOs) detected from the neutron star X-ray transient Aquila X-1 (Aql X-1) with the Rossi X-ray Timing Explorer, between 1997 and 2007. Among kHz QPO sources,
D. Barret, M. Boutelier, M. Miller
semanticscholar +1 more source
The discovery of a 7-14 Hz quasi-periodic oscillation in the x-ray transient XTE J1806-246 [PDF]
, 1999 We have studied the correlated X-ray spectral and X-ray timing behavior of the X-ray transient XTE J1806-246 using data obtained with the proportional counter array on board the Rossi X-Ray Timing Explorer (RXTE).
Rudy WijnandsMichiel van der Klis
semanticscholar +1 more source
Mass transfer during low-mass X-ray transient decays [PDF]
, 2006 The outbursts of low-mass X-ray binaries are prolonged relative to those of dwarf nova cataclysmic variables as a consequence of X-ray irradiation of the disc.
C. Powell, C. Haswell, M. Falanga
semanticscholar +1 more source
A transient ultraluminous X-ray source in NGC 55
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT Ultraluminous X-ray sources (ULXs) are a class of accreting compact objects with X-ray luminosities above 1039 erg s−1 . The average number of ULXs per galaxy is still not well-constrained, especially given the uncertainty on the fraction of ULX transients.
Robba, A, Barra, F
openaire +7 more sources