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The highlights of the round table discussion held to discuss the most important pending problems in cometary astrophysics are reported. A number of experts presented short summaries of what they regarded as the most pressing problems to be solved. These were taken up by a panel of five experts who discussed and analysed the best way to take the

We present the first detection of the mass donor star in the prototype X-ray binary Scorpius X-1. Phase-resolved spectroscopy revealed narrow emission line components from the irradiated secondary star. Radial velocity fits to the Bowen blend emission are used to establish an absolute orbital ephemeris and derive an accurate value for the systemic

We present a cross-correlation between the European Large Area ISO Survey (ELAIS) 15-μm ISO survey with the ROSAT (0.1-2keV) all-sky survey and the pointed observations WGACAT source catalogue. The resulting sample contains 15 objects. Optical spectroscopic identifications exist for 13 objects: six broad-line quasi-stellar objects (QSOs), four

Conference was held in La Palma, Spain in 2001 May. Proceedings have been edited by J. H. Knapen, J. E. Beckman, I. Shlosman, & T. J. Mahoney and published in the ASP Conference Series, Vol. 249 (2001).

Deep extragalactic surveys with ISOCAM revealed the presence of a large density of faint mid-infrared (MIR) sources. We have computed the 15 mu m integrated galaxy light produced by these galaxies above a sensitivity limit of 50 mu Jy. It sets a lower limit to the 15 mu m extragalactic background light of (2.4 +/- 0.5) nW m-2 sr-1. The redshift