5 papers · 1 filter
A Cluster Deficit in the ROSAT NEP Survey
Isabella Gioia
We have used data from the deepest region of the ROSAT All-Sky Survey, the North Ecliptic Pole (NEP) region, to produce a complete and unbiased X-ray selected sample of distant clu…
Weak Lensing Observations of High-Redshift Clusters of Galaxies
D. Clowe, G. Luppino, N. Kaiser +1
We present results of a weak gravitational lensing survey of six X-ray selected high-redshift clusters of galaxies. We find that the masses of the clusters derived from weak lensin…
BeppoSAX observations of two high redshift clusters of galaxies: RXJ0152.7-1357 and MS2053.7-0449
R. Della Ceca, R. Scaramella, I. M. Gioia +3
We present X-ray observations of two high redshift clusters of galaxies carried out with the BeppoSAX satellite. One cluster, RXJ0152.7-1357 at z = 0.83, was selected from the ROSA…
RXJ1716.6+6708: a protocluster at z=0.81?
Isabella M. Gioia
At z=0.809, RXJ1716.6+6708 is the second most distant X-ray selected cluster so far published and the only one with a large number of spectroscopically determined cluster member ve…
The Second Most Distant Cluster of Galaxies in the EMSS
Megan Donahue, G. Mark Voit, Caleb A. Scharf +4
We report on our ASCA, Keck, and ROSAT observations of MS1137.5+6625, the second most distant cluster of galaxies in the Einstein Extended Medium Sensitivity Survey (EMSS), at reds…