An overview is given of the type I X-ray burst properties of the transient KS 1731-260. These characteristics appear to be proto-typical for all type I X-ray...
Optical spectra were obtained of the optical counterpart of the high-latitude (b~=62deg) soft X-ray transient XTE J1118+480 near its quiescent state (R~=18.3)...
The influence of microlensing on spectral line shapes generated by a relativistic accretion disc
We study the influence of gravitational microlensing on the spectral line profiles originating from a relativistic accretion disc. Using the Chen & Halpern...
The influence of microlensing on the shape of the AGN Fe Kalpha line
We study the influence of gravitational microlensing on the AGN Fe Kalpha line confirming that unexpected enhancements recently detected in the iron line of...
The intermediate polar cataclysmic variable GK Persei 120 years after the nova explosion: a first dynamical mass study
We present a dynamical study of the intermediate polar and dwarf nova cataclysmic variable GK Persei (Nova Persei 1901) based on a multisite optical...
The isotopic ^6Li/^7Li ratio in Centaurus X-4 and the origin of Li in X-ray binaries
Context: Cool stars, companions to compact objects, are known to show Li abundances which are high compared to field stars of the same spectral type, which are...
We present Hα and [OIII] (5007 Å) images of the nebula powered by the jet of the black hole candidate and microquasar Cygnus X-1, observed with the 2.5-m Isaac...
The Line Emission Region in III Zw 2: Kinematics and Variability
We have studied the Lyα, Hβ, Hα, and Mg II λ2798 line profiles of the Seyfert 1 galaxy III Zw 2. The shapes of these broad emission lines show evidence of a...
The longest thermonuclear X-ray burst ever observed?. A BeppoSAX Wide Field Camera observation of 4U 1735-44
A long flux enhancement, with an exponential decay time of 86 min, is detected in 4U 1735-44 with the BeppoSAX Wide Field Cameras. We argue that this is a type...