Results 1 to 10 of about 214,668 (294)
A Catalog of Transient X‐Ray Sources in M31 [PDF]
The Astrophysical Journal, 2006 63 pages, 22 figures, 3 tables, accepted for publication in ...
Williams, Benjamin F. +3 more
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Models of ultraluminous X-ray transient sources [PDF]
Astronomy & Astrophysics, 2020 Context. It is now widely accepted that most ultraluminous X-ray sources (ULXs) are binary systems whose large (above 1039 erg s−1) apparent luminosities are explained by super-Eddington accretion onto a stellar-mass compact object. Many of the ULXs, especially those containing magnetized neutron stars, are highly variable; some exhibit transient ...
J.-M. Hameury, J.-P. Lasota
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A New Sample of Transient Ultraluminous X-Ray Sources Serendipitously Discovered by Swift/XRT
The Astrophysical Journal, 2023 Ultraluminous X-ray sources (ULXs) are our best laboratories for studying extreme super-Eddington accretion. Most studies of these objects are of relatively persistent sources; however, there is growing evidence to suggest a large fraction of these ...
Murray Brightman +13 more
doaj +1 more source
The transient ultraluminous X-ray source, ULX-4, in M51 [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT We present the results of a temporal and spectral analysis of the transient source ULX-4 in the galaxy M51. The data used were drawn from Chandra, XMM–Newton, and Swift-XRT archives, spanning the years 2000–2019.. The X-ray flux of the source is seen to vary by two orders of magnitudes within a month but a short-term variability
S Allak +8 more
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Soft X-Ray Transients as Ultraluminous X-Ray Sources [PDF]
Publications of the Astronomical Society of Japan, 2004 Abstract We discuss the possibility that the soft X-ray transient GRS 1915$+$105 evolved from a binary similar to V4641 Sgr (XTE J1819$-$254) by conservative mass-transfer, and estimate the possible mass-transfer rates during the evolution.
Chang-Hwan Lee, Gerald E. Brown
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Transient X-ray source A1118—61 [PDF]
Nature, 1976 THE transient X-ray source Ariel 1118—61 was discovered late in 1974 (refs 1, 2). It has been suggested3 that this source may be associated with the long period Mira-type variable RS Cen, which is located within the error box for the X-ray source.
P. J. N. DAVISON, P. W. SANFORD
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A new transient ultraluminous X-ray source in NGC 7090 [PDF]
Monthly Notices of the Royal Astronomical Society, 2020 ABSTRACT We report on the discovery of a new, transient ultraluminous X-ray source (ULX) in the galaxy NGC 7090. This new ULX, which we refer to as NGC 7090 ULX3, was discovered via monitoring with Swift during 2019–2020, and to date has exhibited a peak luminosity of LX ∼ 6 × 1039 erg s−1.
D J Walton +19 more
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The Astrophysical Journal, 2023 We present a detailed compilation and analysis of the X-ray phase space of low- to intermediate-redshift (0 ≤ z ≤ 1) transients that consolidates observed light curves (and theory where necessary) for a large variety of classes of transient/variable ...
Ava Polzin +10 more
doaj +1 more source
X-ray bursts from the galactic X-ray transient source GRS 1915+105 [PDF]
Advances in Space Research, 2001 We have analyzed publicly available RXTE/PCAs archival data of GRS 1915+105 during its burst/flaring state. The burst cycle ranges from 30 to 1300 s. These bursts are different from the type I and type II classical bursts seen in Low Mass X-ray Binaries (LMXBs) in terms of their temporal and spectral properties.
Yadav, J. S., Rao, A. R.
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Recent Transient X-Ray Sources [PDF]
Highlights of Astronomy, 1977 Prior to the launch of the Ariel V satellite in 1974, four transient X-ray sources had been observed. We placed the study of sources of this type amongst the major objectives of the satellite, and so ensured that the spacecraft ground centre was capable of quick reaction, and that experimenters had rapid access to their data, so that new transients ...
openaire +1 more source