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N. R. Robba
Researcher at University of Palermo
Publications - 54
Citations - 1687
N. R. Robba is an academic researcher from University of Palermo. The author has contributed to research in topics: Neutron star & Emission spectrum. The author has an hindex of 24, co-authored 54 publications receiving 1584 citations.
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Journal ArticleDOI
The Discovery of a State-Dependent Hard Tail in the X-Ray Spectrum of the Luminous Z Source GX 17+2
T. Di Salvo,Luigi Stella,N. R. Robba,M. van der Klis,Luciano Burderi,G. L. Israel,Jeroen Homan,Sergio Campana,F. Frontera,Arvind Parmar +9 more
TL;DR: In this article, the authors reported results of a BeppoSAX (0.1-200 keV) observation of the Z-type low-mass X-ray binary GX 17+2.
Journal ArticleDOI
Detection of a Hard Tail in the X-Ray Spectrum of the Z Source GX 349+2
TL;DR: In this paper, the results of a BeppoSAX observation of the Z source GX 349+2 covering the energy range 0.1-200 keV were presented.
Journal ArticleDOI
A relativistically smeared spectrum in the neutron star X‐ray binary 4U 1705−44: looking at the inner accretion disc with X‐ray spectroscopy
T. Di Salvo,Antonino D'Ai,R. Iaria,Luciano Burderi,Michal Dovciak,Vladimir Karas,Giorgio Matt,Alessandro Papitto,Alessandro Papitto,S. Piraino,S. Piraino,Alessandro Riggio,Alessandro Riggio,N. R. Robba,Andrea Santangelo +14 more
TL;DR: In this paper, a relativistically smeared iron line at about 6.4-6.97 keV was detected in the X-ray burster 4U 1705-44, testifying with high statistical significance that the line profile is distorted by highvelocity motion in the accretion disc.
Journal ArticleDOI
On the spectral evolution of Cygnus X{2 along its color-color diagram
T. Di Salvo,Ruben Farinelli,Luciano Burderi,Filippo Frontera,Erik Kuulkers,Erik Kuulkers,N. Masetti,N. R. Robba,Luigi Stella,M. van der Klis +9 more
TL;DR: In this paper, the authors report on the results of a broad band (0.1{200 keV) spectral study of Cyg X{2 using two BeppoSAX observations taken in 1996 and 1997, respectively, for a total on-source time of100 ks.
Journal ArticleDOI
The optical counterpart to SAX J1808.4-3658 in quiescence: Evidence of an active radio pulsar?
TL;DR: In this article, the authors proposed an alternative scenario, in which the irradiation is due to the release of rotational energy by the fast spinning neutron star, switched on, as magneto-dipole rotator (radio pulsar), during quiescence.