Benson, B. A.de Haan, T.Dudley, J. P.Reichardt, C. L.Aird, K. A.Andersson, K.Armstrong, R.Ashby, MatthewBautz, M.Bayliss, MatthewBazin, G.Bleem, L. E.Brodwin, M.Carlstrom, J. E.Chang, C. L.Cho, H. M.Clocchiatti, A.Crawford, T. M.Crites, A. T.Desai, S.Dobbs, M. A.Foley, R. J.Forman, WilliamGeorge, E. M.Gladders, M. D.Gonzalez, A. H.Halverson, N. W.Harrington, N.High, F. W.Holder, G. P.Holzapfel, W. L.Hoover, S.Hrubes, J. D.Jones, C.Joy, M.Keisler, R.Knox, L.Lee, A. T.Leitch, E. M.Liu, J.Lueker, M.Luong-Van, D.Mantz, A.Marrone, D. P.McDonald, M.McMahon, J. J.Mehl, J.Meyer, S. S.Mocanu, L.Mohr, J. J.Montroy, T. E.Murray, S. S.Natoli, T.Padin, S.Plagge, T.Pryke, C.Rest, A.Ruel, JonathanRuhl, J. E.Saliwanchik, B. R.Saro, A.Sayre, J. T.Schaffer, K. K.Shaw, L.Shirokoff, E.Song, J.Spieler, H. G.Stalder, BrianStaniszewski, Z.Stark, AntonyStory, K.Stubbs, ChristopherSuhada, R.van Engelen, A.Vanderlinde, K.Vieira, J. D.Viklinin, AlexeyWilliamson, R.Zahn, O.Zenteno, A.2014-03-042013Benson, B. A., T. de Haan, J. P. Dudley, C. L. Reichardt, K. A. Aird, K. Andersson, R. Armstrong, et al. 2013. “Cosmological Constraints from Sunyaev-Zel'dovich-selected Clusters with X-Ray Observations in the First 178 deg2 of the South Pole Telescope Survey.” The Astrophysical Journal 763 (2) (February 1): 147. doi:10.1088/0004-637x/763/2/147. http://dx.doi.org/10.1088/0004-637X/763/2/147.0004-637Xhttp://nrs.harvard.edu/urn-3:HUL.InstRepos:11857775We use measurements from the South Pole Telescope (SPT) Sunyaev-Zel'dovich (SZ) cluster survey in combination with X-ray measurements to constrain cosmological parameters. We present a statistical method that fits for the scaling relations of the SZ and X-ray cluster observables with mass while jointly fitting for cosmology. The method is generalizable to multiple cluster observables, and self-consistently accounts for the effects of the cluster selection and uncertainties in cluster mass calibration on the derived cosmological constraints. We apply this method to a data set consisting of an SZ-selected catalog of 18 galaxy clusters at z > 0.3 from the first 178 deg2 of the 2500 deg2 SPT-SZ survey, with 14 clusters having X-ray observations from either Chandra or XMM-Newton. Assuming a spatially flat ΛCDM cosmological model, we find the SPT cluster sample constrains σ8(Ω m /0.25)0.30 = 0.785 ± 0.037. In combination with measurements of the cosmic microwave background (CMB) power spectrum from the SPT and the seven-year Wilkinson Microwave Anisotropy Probe data, the SPT cluster sample constrains σ8 = 0.795 ± 0.016 and Ω m = 0.255 ± 0.016, a factor of 1.5 improvement on each parameter over the CMB data alone. We consider several extensions beyond the ΛCDM model by including the following as free parameters: the dark energy equation of state (w), the sum of the neutrino masses (Σm ν), the effective number of relativistic species (N eff), and a primordial non-Gaussianity (f NL). We find that adding the SPT cluster data significantly improves the constraints on w and Σm ν beyond those found when using measurements of the CMB, supernovae, baryon acoustic oscillations, and the Hubble constant. Considering each extension independently, we best constrain w = –0.973 ± 0.063 and the sum of neutrino masses Σm ν < 0.28 eV at 95% confidence, a factor of 1.25 and 1.4 improvement, respectively, over the constraints without clusters. Assuming a ΛCDM model with a free N eff and Σm ν, we measure N eff = 3.91 ± 0.42 and constrain Σm ν < 0.63 eV at 95% confidence. We also use the SPT cluster sample to constrain f NL = –220 ± 317, consistent with zero primordial non-Gaussianity. Finally, we discuss the current systematic limitations due to the cluster mass calibration, and future improvements for the recently completed 2500 deg2 SPT-SZ survey. The survey has detected ~500 clusters with a median redshift of ~0.5 and a median mass of ~2.3 × 1014 M ☉ h –1 and, when combined with an improved cluster mass calibration and existing external cosmological data sets will significantly improve constraints on w.en-USJournal Article2014-01-17BA Benson, T de Haan, JP Dudley, CL Reichardt, KA Aird, K Andersson, R Armstrong, MLN Ashby, M Bautz, M Bayliss, G Bazin, LE Bleem, M Brodwin, JE Carlstrom, CL Chang, HM Cho, A Clocchiatti, TM Crawford, AT Crites, S Desai, MA Dobbs, RJ Foley, WR Forman, EM George, MD Gladders, AH Gonzalez, NW Halverson, N Harrington, FW High, GP Holder, WL Holzapfel, S Hoover, JD Hrubes, C Jones, M Joy, R Keisler, L Knox, AT Lee, EM Leitch, J Liu, M Lueker, D Luong-Van, A Mantz, DP Marrone, M McDonald, JJ McMahon, J Mehl, SS Meyer, L Mocanu, JJ Mohr, TE Montroy, SS Murray, T Natoli, S Padin, T Plagge, C Pryke, A Rest, J Ruel, JE Ruhl, BR Saliwanchik, A Saro, JT Sayre, KK Schaffer, L Shaw, E Shirokoff, J Song, HG Spieler, B Stalder, Z Staniszewski, AA Stark, K Story, CW Stubbs, R Suhada, A van Engelen, K Vanderlinde, JD Vieira, A Vikhlinin, R Williamson, O Zahn, A Zenteno2014-03-0410.1088/0004-637x/763/2/147