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The Zoo of X-Ray Sources in the Galactic Center Region: Observations with BeppoSAX
We report the results of a survey of the Galactic center region ( l < 2°, b < 05) performed with the BeppoSAX satellite. The flux from the center of our Galaxy corresponds to a luminosity of ~3 ×
XMM-Newton observations of GX 13 + 1: correlation between photoionised absorption and broad line emission
We analysed data from five XMM-Newton observations of GX 13+1 to investigate the variability of the photo-ionised absorber in this source. We fitted EPIC and RGS spectra obtained from the
XMMU J174716.1-281048: a quasi-persistent very faint X-ray transient?
The X-ray transient XMMU J174716.1-281048 was serendipitously discovered with XMM-Newton in 2003. It lies about 0.9 degrees off the Galactic Centre and its spectrum shows a high absorption (~8 x
Introducing the CTA concept
The Cherenkov Telescope Array (CTA) is a new observatory for very high-energy (VHE) gamma rays. CTA has ambitions science goals, for which it is necessary to achieve full-sky coverage, to improve the
Science with the Cherenkov Telescope Array
The Cherenkov Telescope Array, CTA, will be the major global observatory for very high energy gamma-ray astronomy over the next decade and beyond. The scientific potential of CTA is extremely broad:
An XMM-Newton study of the X-ray binary MXB 1659-298 and the discovery of narrow X-ray absorption lines
We report the discovery of narrow X-ray absorption lines from the low-mass X-ray binary MXB 1659- 298 during an XMM-Newton observation in 2001 February. The 7.1 hr orbital cycle is clearly evident
XMM-Newton observation of a spectral state transition in the peculiar radio/X-ray/gamma-ray source LS I +61 303
We report the results of XMM-Newton and BeppoSAX observations of the radio and X-ray emitting star LS I+61 303, likely associated with the gamma-ray source 2CG 135+01 and recently detected also at
An INTEGRAL hard X-ray survey of the Large Magellanic Cloud
Two observation campaigns in 2003 and 2004 with the INTEGRAL  satellite have provided the first sensitive survey of the Large Magellanic Cloud with an imaging instrument in the hard X-ray range (15
An alternative hypothesis for the outburst mechanism in Supergiant Fast X-ray Transients: the case of IGR J11215-5952
Context. The physical mechanism responsible for the short outbursts in a recently recognised class of high mass X-ray binaries, the supergiant fast X-ray transients (SFXTs), is still unknown. Two
XMM-Newton observation of the persistent Be/NS X-ray binary pulsar RX J1037.5–5647 in a low luminosity state
The spectra of several X-ray binary pulsars display a clear soft excess, which in most cases can be described with a blackbody model, above the main power-law component. While in the high-luminosity
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