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83 papers · 1 filter
The 0.1-200 keV spectrum of the blazar PKS 2005-489 during an active state
G. Tagliaferri, G. Ghisellini, P. Giommi +8
The bright BL Lac object PKS 2005-489 was observed by BeppoSAX on November 1-2, 1998, following an active X-ray state detected by RossiXTE. The source, detected between 0.1 and 200…
X-ray Clusters of Galaxies as Tracers of Structure in the Universe
S. Borgani, L. Guzzo
Clusters of galaxies outline the network of the distribution of visible matter in the Universe, marking the highest-mass knots where filamentary structures join together. If we obs…
Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third Edition - Comments and Statistics
L. E. Pasinetti Fracassini, L. Pastori, S. Covino +1
The Catalogue, available at the Centre de Données Stellaires de Strasbourg, consists of 13573 records concerning the results obtained from different methods for 7778 stars, reporte…
The ROSAT-ESO Flux Limited X-Ray (REFLEX) Galaxy Cluster Survey I: The Construction of the Cluster Sample
H. Boehringer, P. Schuecker, L. Guzzo +10
We describe the construction of an X-ray flux-limited sample of galaxy clusters, the REFLEX survey catalogue, to be used for cosmological studies. The survey is based on the ROSAT…
Metallicity Gradients in X-ray Clusters of Galaxies
Sabrina De Grandi, Silvano Molendi
We present the projected metallicity profiles for a sample of 17 rich galaxy clusters observed by BeppoSAX. We find that the 8 non-cooling flow clusters have flat metallicity profi…
Surveys and the Blazar Parameter Space
E. S. Perlman, P. Padovani, H. Landt +5
The rareness of blazars, combined with the previous history of relatively shallow, single-band surveys, has dramatically colored our perception of these objects. Despite a quarter-…