Results 71 to 80 of about 238,966 (146)

Nonnuclear Hyper/Ultraluminous X-Ray Sources in the Starbursting Cartwheel Ring Galaxy [PDF]

, 2003
Yu Gao, Q. Daniel Wang, P. N. Appleton, Ray A. Lucas   +3 more
openalex   +1 more source

What Is the Black Hole Spin in Cyg X-1?

The Astrophysical Journal Letters
We perform a detailed study of the black hole spin of Cyg X-1, using accurate broadband X-ray data obtained in the soft spectral state by simultaneous NICER and NuSTAR observations, supplemented at high energies by INTEGRAL data.
Andrzej A. Zdziarski, Swadesh Chand, Srimanta Banerjee, Michał Szanecki, Agnieszka Janiuk, Piotr Lubiński, Andrzej Niedźwiecki, Gulab Dewangan, Ranjeev Misra   +8 more
doaj   +1 more source

Accretion Disk Spectra of Ultraluminous X‐Ray Sources in Nearby Spiral Galaxies and Galactic Superluminal Jet Sources [PDF]

, 2003
K. Ebisawa, P. T. Życki, Aya Kubota, Tsunefumi Mizuno, Ken‐ya Watarai   +4 more
openalex   +1 more source

Simultaneous Multiwavelength Observations of the Repeating Fast Radio Burst FRB 20190520B with Swift and FAST

The Astrophysical Journal
Among several dozen known repeating fast radio bursts, those precisely localized offer the best opportunities to explore their multiwavelength counterparts, which are key to uncovering their origins.
Zhen Yan, Wenfei Yu, Kim L. Page, Jie Lin, Di Li, Chenhui Niu, Casey Law, Bing Zhang, Shami Chatterjee, Xian Zhang, Reshma Anna-Thomas   +10 more
doaj   +1 more source

Search for ultraluminous X-ray sources in nearby galaxies [PDF]

arXiv, 2002
Little is presently known about the nature of ultraluminous X-ray sources (ULX). Different hypotheses have been proposed to explain their properties: intermediate-mass BHs, Kerr BHs, young SNR, or background AGN. Some of the current problems and open questions in this research field are here reviewed.
arxiv  

Discovery of X-Ray Quasi-periodic Oscillations from an Ultraluminous X-Ray Source in M82: Evidence against Beaming [PDF]

, 2003
Tod E. Strohmayer, R. F. Mushotzky
openalex   +1 more source

The Orbit of NGC 5907 ULX-1

The Astrophysical Journal
We report on the orbit of the binary system powering the most extreme ultraluminous X-ray pulsar known to date: NGC 5907 ULX-1 (hereafter ULX1). ULX1 has been the target of a substantial multi-instrument campaign, mainly in the X-ray band, but no clear ...
Andrea Belfiore, Ruben Salvaterra, Lara Sidoli, Gian Luca Israel, Luigi Stella, Andrea De Luca, Sandro Mereghetti, Paolo Esposito, Fabio Pintore, Antonino D’Aì, Guillermo Rodrìguez Castillo, Dominic J. Walton, Felix Fürst, Danilo Magistrali, Anna Wolter, Matteo Imbrogno   +15 more
doaj   +1 more source

The Time-variable Ultraluminous X-Ray Sources of “The Antennae” [PDF]

, 2003
G. Fabbiano, A. Zezas, A. R. King, T. J. Ponman, A. H. Rots, F. Schweizer   +5 more
openalex   +1 more source

X-Ray Spectroscopic Evidence for Intermediate-Mass Black Holes: Cool Accretion Disks in Two Ultraluminous X-Ray Sources [PDF]

, 2003
J. M. Mïller, G. Fabbiano, M. Coleman Miller, A. C. Fabian   +3 more
openalex   +1 more source

The unusual supernova remnant surrounding the ultraluminous X-ray source IC 342 X-1 [PDF]

, 2003
T. P. Roberts, M. R. Goad, M. J. Ward, R. S. Warwick   +3 more
openalex   +1 more source