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Beppo-SAX temperature maps of galaxy clusters in the Corona Borealis supercluster: A2061, A2067 and A2124
F. Marini, S. Bardelli, E. Zucca +6
In this paper we present the analysis of Beppo-SAX observations of the cluster pairs A2061-A2067 and A2122-A2124, located in the Corona Borealis supercluster, which have been selec…
Abell 3560, a galaxy cluster at the edge of a major merging event
S. Bardelli, T. Venturi, E. Zucca +3
In this paper we study A3560, a rich cluster at the southern periphery of the A3558 complex, a chain of interacting clusters in the central part of the Shapley Concentration superc…
Gravitating mass profiles of nearby galaxy clusters and relations with X-ray gas temperature, luminosity and mass
S. Ettori, S. De Grandi, S. Molendi
We consider a sample of 22 nearby clusters of galaxies observed with the Medium Energy Concentrator Spectrometer (MECS) on board of BeppoSAX. They cover the range in gas temperatur…
The ROSAT All-Sky Survey: a Catalog of Clusters of Galaxies in a Region of 1 Ster around the South Galactic Pole
R. Cruddace, W. Voges, H. Boehringer +7
A field of 1.013 ster in the ROSAT all-sky survey (RASS), centered on the south galactic pole (SGP), has been searched in a systematic, objective manner for clusters of galaxies. T…
Temperature Profiles of Nearby Clusters of Galaxies
Sabrina De Grandi, Silvano Molendi
We report results from the analysis of 21 nearby galaxy clusters, 11 with cooling flow (CF) and 10 without cooling flow, observed with BeppoSAX. The temperature profiles of both CF…
Non-Gaussian morphology on large scales: Minkowski functionals of the REFLEX cluster catalogue
M. Kerscher, K. Mecke, P. Schuecker +6
In order to quantify higher-order correlations of the galaxy cluster distribution we use a complete family of additive measures which give scale-dependent morphological information…
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…
The ROSAT-ESO Flux-Limited X-Ray (REFLEX) Galaxy Cluster Survey III: The Power Spectrum
Peter Schuecker, Hans Boehringer, Luigi Guzzo +11
We present a measure of the power spectrum on scales from 15 to 800 Mpc/h using the ROSAT-ESO Flux-Limited X-Ray(REFLEX) galaxy cluster catalogue. The REFLEX survey provides a samp…
The ROSAT-ESO Flux Limited X-ray (REFLEX) Galaxy Cluster Survey II: The Spatial Correlation Function
C. A. Collins, L. Guzzo, H. Boehringer +9
We report the results of the spatial two-point correlation function xi(r) for the new X-ray galaxy cluster survey REFLEX, which comprises of 452 X-ray selected clusters (449 with r…
BeppoSAX - ROSAT PSPC observations of the Shapley Supercluster: A3562
S. Ettori, S. Bardelli, S. De Grandi +3
We present a combined analysis of the BeppoSAX and ROSAT PSPC observation of the cluster of galaxies A3562, a massive member of the core of the Shapley Supercluster. With a complex…
Hard X-ray emission from the galaxy cluster A2256
R. Fusco-Femiano, D. Dal Fiume, S. De Grandi +6
After the positive detection by BeppoSAX of hard X-ray radiation up to ~80 keV in the Coma cluster spectrum, we present evidence for nonthermal emission from A2256 in excess of the…
Interaction in Abell 2256: the BeppoSAX view
Silvano Molendi, Sabrina De Grandi, Roberto Fusco-Femiano
We present results from a spatially resolved spectral analysis of the merging cluster Abell 2256. The long integration time (135 ks) and the good spatial resolution of the MECS onb…
A BeppoSAX observation of the merging cluster Abell 3266
Sabrina De Grandi, Silvano Molendi
We present results from a BeppoSAX observation of the rich cluster Abell 3266. The broad band spectrum (2-50 keV) of the cluster, when fitted with an optically thin thermal emissio…
The luminosity function of cluster galaxies. II. Data reduction procedures applied to the cluster Abell 496
A. Moretti, E. Molinari, G. Chincarini +1
We initiated a large project aimed to estimate the Luminosity Function of galaxies in clusters and to evaluate its relation to cluster morphology. With this paper we deem necessary…
The REFLEX Cluster Survey: Observing Strategy and First Results on Large-Scale Structure
L. Guzzo, H. Boehringer, P. Schuecker +9
We give a general description of the optical observing strategy of the ROSAT-ESO Flux-Limited X-ray (REFLEX) cluster survey. This presently includes 460 clusters of galaxies select…
A Flux-limited Sample of Bright Clusters of Galaxies from the Southern Part of the ROSAT All-Sky Survey: the Catalog and the LogN-LogS
S. De Grandi, H. Böhringer, L. Guzzo +8
We describe the selection of an X-ray flux-limited sample of bright clusters of galaxies in the southern hemisphere, based on the first analysis of the ROSAT All-Sky Survey data (R…
The X-ray Luminosity Function of Bright Clusters in the Local Universe
S. De Grandi, L. Guzzo, H. Böhringer +8
We present the X-ray luminosity function (XLF) for clusters of galaxies derived from the RASS1 Bright Sample. The sample, selected from the ROSAT All-Sky Survey in a region of 2.5…
A Study of the Temperature gradient in Virgo/M87 with the MECS on board Beppo-SAX
F. D'Acri, S. De Grandi, S. Molendi
Ground and in flight calibrations of the MECS experiment on board Beppo-SAX have demonstrated that this is currently the best X-ray imaging experiment above 3 keV. The MECS on-axis…
The Steepness Ratio Technique: A New Method to analyze ROSAT All-Sky Survey Extended Sources
S. De Grandi, S. Molendi, H. Böhringer +2
In this first paper of a series we develop a new technique to analyze clusters of galaxies observed during the ROSAT All-Sky Survey (RASS). We call this method the Steepness Ratio…
Discovery of an Arc System in the Brightest ROSAT Cluster of Galaxies
S. Schindler, L. Guzzo, H. Ebeling +8
We report the discovery of two bright arcs in what turns out to be the brightest X--ray cluster in the ROSAT band ever observed, RXJ1347.5-1145. Its luminosity is $(6.2\pm0.6) \cdo…