Previous | Session 144 | Next | Author Index | Block Schedule
A. Vikhlinin (SAO), 400d Survey Team
We have serendipitously detected a large number of high-redshift galaxy clusters in ROSAT pointings covering over 400 square degrees of extragalactic sky. Each X-ray detection is optically confirmed and spectroscopic redshifts were obtained for all objects. The most massive distant clusters (43 objects at z>0.35) were followed up with Chandra. This program is nearly completed. These observations provide the most accurate to-date measurement of the cluster number density evolution. We will present the cosmological constraints provided by the 400d distant cluster sample.
Previous | Session 144 | Next
Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.