An analysis of the center to limb variation of the geometrical properties of spots has been carried out. It has revealed that spots do not have a symmetrical...
The Winds of O-Type Stars: Ionization Structure and Revised Stellar Parameters from Far-UV Spectra
We derived consistent photospheric and wind parameters of O-type stars, by analyzing high-resolution spectra in the range 905 to 3250 Å with line-blanketed...
The X ray transient GS2023+338: The 0d.24 and 6d.5 modulations
High resolution spectrophotometry of the black hole system V404 Cyg during quiescence, performed during 1990 and 1991, is discussed. In addition to a 6.5d...
The X-Ray Behavior of Supergiant Fast X-Ray Transients: An INTEGRAL View
The data provided by the ESA INTEGRAL mission have revealed the presence of a huge new population of HMXB sources. Among them, an important fraction belong to...
The analysis of the X-ray data for a sample of 51 LINER nuclei with available X-ray Chandra imaging is reported. Our aim was to investigate the physical...
NGC 300 was observed by the Chandra X-ray Observatory on 24 Sept. 2010 for 63 ks as part of the Chandra Local Volume Survey. Roughly one hundred highly...
The X-ray Spectrum and Lightcurve of the Eclipsing LMXB 4U2129+47 in a Low State
We report on the x-ray spectrum and lightcurve of the eclipsing Low-Mass X-ray Binary (LMXB) 4U2129+47 as observed with the ROSAT PSPC during its current...