XMM-Newton Observation of the Cluster Zw 1305.4+2941 in the Field SA 57

• Published in: The Astrophysical journal Vol. 673; no. 1; pp. 176 - 182
• Main Authors: Gastaldello, Fabio, Trevese, Dario, Vagnetti, Fausto, Fusco-Femiano, Roberto
• Format: Journal Article
• Language: English
• Published: Chicago, IL IOP Publishing 20.01.2008; University of Chicago Press
• Subjects: Astronomy; Earth, ocean, space; Exact sciences and technology; Galaxy clusters; galaxies: clusters: general; X-rays: general
• ISSN: 0004-637X; 1538-4357
• DOI: 10.1086/523937

We report the details of an XMM-Newton observation of the cluster of galaxies Zw 1305.4+2941 at the intermediate redshift z = 0.241, increasing the small number of Interesting X-ray constraints on properties of similar to 3 keV systems above z = 0.1. Based on the similar to 45 ks XMM-Newton observation, we find that within a radius of 228 kpc the cluster has an unabsorbed X-ray flux of fx = (2.07 plus or minus 0.06) x 10 super(-18) ergs cm super(-2) s super(-1) temperature of kT = 3.17 plus or minus 0.19 keV, in good agreement with the previous ROSAT determination, and an abundance of 0.93 super(+) sub(-) super(0) sub(0) super(.) sub(.) super(2) sub(2) super(4) sub(9) Z [unk]. Within r sub(500) = 723 plus or minus 10 kpc the rest-frame bolometric X-ray luminosity is Lx (r sub(500)) = (1.25 plus or minus 0.16) x 10 super(44) h super(-) sub(7) super(2) sub(0) ergs s super(-1). The cluster obeys the scaling relations for Lx, T, and the velocity dispersion [unk] derived at intermediate redshift for kT [unk] 4 keV, for which we provide new fits for all objects in the literature. The mass derived from an isothermal NFW model fit is M sub(vlr) [unk] (2.77 plus or minus 0.21) x 10 super(14) M [unk], with the concentration parameter e = 7.9 plus or minus 0.5.