8 papers
X-ray and optical monitoring of the peculiar source 4U 1700+24/V934 Her
N. Masetti, D. Dal Fiume, G. Cusumano +10
(Abridged) We report on ASCA and BeppoSAX observations of the X-ray source 4U 1700+24 and on (quasi-)simultaneous spectroscopy of its optical counterpart, V934 Her, from the Loiano…
A BeppoSAX observation of Her X-1 during the first main-on after an anomalous low-state: evidence for rapid spin-down
T. Oosterbroek, A. N. Parmar, M. Orlandini +3
Results of a BeppoSAX observation of Her X-1 in 2000 October during the first main-on state after the longest recorded anomalous low-state are presented. The 0.1-30 keV spectrum, l…
Broad band spectrum of Cygnus X-1 in two spectral states with BeppoSAX
F. Frontera, E. Palazzi, A. A. Zdziarski +13
We report on the 0.5--200 keV spectral properties of Cyg X-1 observed at different epochs with the Narrow Field Instruments of the BeppoSAX satellite. The source was in its soft st…
Discovery of hard X-ray emission from Type II bursts of the Rapid Burster
F. Frontera, N. Masetti, M. Orlandini +9
We report on results of BeppoSAX Target Of Opportunity (TOO) observations of the source MXB 1730-335, also called the Rapid Burster (RB), made during its outburst of February-March…
Cyclotron lines in X-ray pulsars as a probe of relativistic plasmas in superstrong magnetic fields
D. Dal Fiume, Filippo Frontera, Nicola Masetti +7
The systematic search for the presence of cyclotron lines in the spectra of accreting X-ray pulsars is being carried on with the BeppoSAX satellite since the beginning of the missi…
The broad band spectral properties of binary X-ray pulsars
D. Dal Fiume, M. Orlandini, S. Del Sordo +7
The X-ray telescopes on board BeppoSAX are an optimal set of instruments to observe bright galactic binary pulsars. These sources emit very hard and quite complex X-ray spectra tha…