5 papers
X-Ray Observations of Cygnus X-2
S. Piraino, A. Santangelo, P. Kaaret
We report on a joint BeppoSAX/RossiXTE observation of the Z-type low mass X-ray binary Cyg X-2. The source was in the so-called high overall intensity state and in less than 24 hou…
The likely detection of pulsed high-energy gamma-ray emission from millisecond pulsar PSR J0218+4232
L. Kuiper, W. Hermsen, F. Verbunt +5
We report circumstantial evidence for the first detection of pulsed high-energy gamma-ray emission from a millisecond pulsar, PSR J0218+4232, using data collected with the Energeti…
The broad-band spectrum of OAO1657-415 with BeppoSAX: In search of cyclotron lines
M. Orlandini, D. Dal Fiume, S. Del Sordo +4
We report on a 30 ks observation of the high-mass X-ray binary pulsar OAO1657-415 performed by BeppoSAX on September 1998. The wide band spectrum is well fit by both a cutoff power…
BeppoSAX observations of an orbital cycle of the X-ray binary pulsar GX301-2
M. Orlandini, D. Dal Fiume, F. Frontera +4
We present preliminary results on our campaign of observations of the X-ray binary pulsar GX301-2. BeppoSAX observed this source six times in January/February 1998: at the periastr…
The Vela X-1 pulse-averaged spectrum as observed by BeppoSAX
M. Orlandini, D. Dal Fiume, F. Frontera +7
We report on the 20 ksec observation of Vela X-1 performed by BeppoSAX on 1996 July 14 during its Science Verification Phase. We observed the source in two intensity states, charac…