We propose to complete the last 10% of highquality observations for theeeHIFLUGCS galaxy cluster sample (31 of 376 clusters). The sample is based onROSAT with completely and homogeneously redetermined
Not available. Dataset provided by the ESDC. Please refer to the datasets landing page at http://esdcdoi.esac.esa.int/doi/html/data/astronomy/xmmnewton/015636.html
With the paper A Hubble Diagram for Quasars Risaliti and Lusso (2015)established quasars as a kind of standard candles to measure cosmologicalparameters. This method is of utmost importance as it allo
