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XTE and SAX observations of the Be/neutron star system RX J0146.9+6121
S. Mereghetti, A. Tiengo, G. L. Israel +1
We report XTE and SAX observations of the X-ray pulsar RX J0146.9+612, the neutron star/Be binary system with the longest known spin period. Data obtained one month after the most…
Discovery of a faint 437 s X-ray pulsar 1SAX J1452.8-5949
T. Oosterbroek, M. Orlandini, A. N. Parmar +6
A new pulsar, 1SAX J1452.8-5949, was discovered during a BeppoSAX galactic plane survey on 1999 July 20 at R.A.=14h 52m 49s, Dec=-59 49' 18'' (J2000) with a 90% confidence uncertai…
A BeppoSAX study of the pulsating transient X0115+63: the first X-ray spectrum with four cyclotron harmonic features
A. Santangeo, A. Segreto, S. Giarrusso +9
The recurrent hard pulsating X-ray transient §was observed with \B on March 19, when the source was at a 2--10 keV flux level of 310~mCrab. We report on the high energy spect…
GRB 990510: linearly polarized radiation from a fireball
S. Covino, D. Lazzati, G. Ghisellini +12
Models for gamma-ray burst afterglows envisage an hyper-relativistic fireball that is decelerated in the ambient medium around the explosion site. This interaction produces a shock…
Broad Band X-ray Spectra of M31 Sources with BeppoSAX
Ginevra Trinchieri, Gian Luca Israel, Lucio Chiappetti +5
We present the first spectral study of the X-ray emitting stellar sources in M31 in the energy band from 0.1 to 10 keV. We find that the globular cluster sources have spectral char…
BeppoSAX monitoring of the ``anomalous'' X-ray pulsar 4U 0142+61
G. L. Israel, T. Oosterbroek, L. Angelini +7
The 8.7s X-ray pulsar 4U 0142+61 was monitored by BeppoSAX between January 1997 and February 1998. This source belongs to the rapidly growing class of "anomalous" X-ray pulsars (AX…