Results 21 to 30 of about 25,901 (208)
A transient ultraluminous X-ray source in NGC 55 [PDF]
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
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The light curve of a transient X-ray source [PDF]
The Astrophysical Journal, 1975 The Ariel-5 satellite has monitored the X-ray light curve of A1524-62 almost continuously from 40 days prior to maximum light until its disappearance below the effective experimental sensitivity. The source exhibited maximum light on Dec. 4, 1974, at a level of 0.9 the apparent magnitude of the Crab Nebula in the energy band 3-6 keV.
L. J. Kaluzienski +7 more
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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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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 ...
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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,
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A microservice-based portal for X-ray transient and variable sources [PDF]
, 2016 Modern soft X-ray observatories can yield unique insights into time domain astrophysics, and a huge amount of information is stored - and largely unexploited - in data archives. Like a treasure-hunt, the EXTraS project is harvesting the hitherto unexplored temporal domain information buried in the serendipitous data collected by the European Photon ...
DAgostino, Daniele +8 more
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DISCOVERY OF MILLIHERTZ X-RAY OSCILLATIONS IN A TRANSIENT ULTRALUMINOUS X-RAY SOURCE IN M82 [PDF]
The Astrophysical Journal, 2010 5 pages, 1 figure, accepted for publication in The Astrophysical Journal ...
Feng, Hua, Rao, Fengyun, Kaaret, Philip
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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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Discovery of a New X-Ray Transient Source in the Scutum Region with Suzaku [PDF]
Publications of the Astronomical Society of Japan, 2007 During an observation of the Galactic plane in the Scutum region with the Suzaku satellite, we discovered a new X-ray transient source, designated Suzaku J1844$-$0404. Compared with previous Chandra observations of the same field, four Chandra X-ray sources exist within the current positional uncertainty of Suzaku J1844$-$0404. A firm identification is
Yamauchi, Shigeo +9 more
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Molecular Oncology, EarlyView.Glioma cells mainly express the endothelin receptor EDNRB, while EDNRA is restricted to a perivascular tumor subpopulation. Endothelin signaling reduces glioma cell proliferation while promoting migration and a proneural‐to‐mesenchymal transition associated with poor prognosis. This pathway activates Ca2+, K+, ERK, and STAT3 signalings and is regulated
Donovan Pineau +36 more
wiley +1 more source