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Results are presented from a detailed analysis of optical and X-rayobservations of moderate-redshift galaxy clusters from the Canadian Network forObservational Cosmology (CNOC) subsample of the EMSS. The combination ofextensive optical and deep X-ray observations of these clusters make them idealcandidates for multiwavelength mass comparison studies. X-ray surfacebrightness profiles of 14 clusters with 0.17<z<0.55 are constructed fromChandra observations and fit to single and double beta-models. Spatiallyresolved temperature analysis is performed, indicating that five of theclusters in this sample exhibit temperature gradients within their inner 60-200kpc. Integrated spectra extracted within R_2500 provide temperature, abundance,and luminosity information. Under assumptions of hydrostatic equilibrium andspherical symmetry, we derive gas and total masses within R_2500 and R_200. Wefind an average gas mass fraction within R_200 of 0.136 +/- 0.004, resulting inOmega_m=0.28 +/- 0.01 (formal error). We also derive dynamical masses for theseclusters to R_200. We find no systematic bias between X-ray and dynamicalmethods across the sample, with an average M(dyn)/M(X-ray) = 0.97 +/- 0.05. Wealso compare X-ray masses to weak lensing mass estimates of a subset of oursample, resulting in a weighted average of M(lens)/M(X-ray) of 0.99 +/- 0.07.We investigate X-ray scaling relationships and find powerlaw slopes which areslightly steeper than the predictions of self-similar models, with an E(z)^(-1)Lx-Tx slope of 2.4 +/- 0.2 and an E(z) M_2500-Tx slope of 1.7 +/- 0.1.Relationships between red-sequence optical richness (B_gc,red) and globalcluster X-ray properties (Tx, Lx and M_2500) are also examined and fitted.Comment: Astrophysical Journal, 48 pages, 11 figures, LaTeX. Added correction  to surface brightness normalization of MS1512.4+3647, corrections to sample  gas mass fractions and calculated value of Omega_m. Figure resolution has  been reduced to comply with astro-ph upload requirement

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Multiwavelength Mass Comparisons of the \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \…