# X-ray Properties of the First SZE-selected Galaxy Cluster Sample from the South Pole Telescope

Source: [X-ray Properties of the First SZE-selected Galaxy Cluster Sample from the South Pole Telescope](<https://www.sota2.com/research/paper/68fa2bf31e209131ce84b527>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T15:01:19.106Z

Authors: K. Andersson, B. A. Benson, P. A. R. Ade, K. A. Aird, B. Armstrong, M. Bautz, L. E. Bleem, M. Brodwin, J. E. Carlstrom, C. L. Chang, T. M. Crawford, A. T. Crites, T. de Haan, S. Desai, M. A. Dobbs, J. P. Dudley, R. J. Foley, W. R. Forman, G. Garmire, E. M. George, M. D. Gladders, N. W. Halverson, F. W. High, G. P. Holder, W. L. Holzapfel, J. D. Hrubes, C. Jones, M. Joy, R. Keisler, L. Knox, A. T. Lee, E. M. Leitch, M. Lueker, D. P. Marrone, J. J. McMahon, J. Mehl, S. S. Meyer, J. J. Mohr, T. E. Montroy, S. S. Murray, S. Padin, T. Plagge, C. Pryke, C. L. Reichardt, A. Rest, J. Ruel, J. E. Ruhl, K. K. Schaffer, L. Shaw, E. Shirokoff, J. Song, H. G. Spieler, B. Stalder, Z. Staniszewski, A. A. Stark, C. W. Stubbs, K. Vanderlinde, J. D. Vieira, A. Vikhlinin, R. Williamson, Y. Yang, O. Zahn

Published: 2010-06-15T19:59:01.000Z

## Abstract

We present results of X-ray observations of a sample of 15 clusters selected via their imprint on the cosmic microwave background (CMB) from the thermal Sunyaev-Zel'dovich (SZ) effect. These clusters are a subset of the first SZ-selected cluster catalog, obtained from observations of 178 deg^2 of sky surveyed by the South Pole Telescope. Using X-ray observations with Chandra and XMM-Newton, we estimate the temperature, T\_X, and mass, M\_g, of the intracluster medium (ICM) within r\_500 for each cluster. From these, we calculate Y\_X=M\_g T\_X and estimate the total cluster mass using a M\_500-Y\_X scaling relation measured from previous X-ray studies. The integrated Comptonization, Y\_SZ, is derived from the SZ measurements, using additional information from the X-ray measured gas density profiles and a universal temperature profile. We calculate scaling relations between the X-ray and SZ observables, and find results generally consistent with other measurements and the expectations from simple self-similar behavior. Specifically, we fit a Y\_SZ-Y\_X relation and find a normalization of 0.82 +- 0.07, marginally consistent with the predicted ratio of Y\_SZ/Y\_X=0.91+-0.01 that would be expected from the density and temperature models used in this work. Using the Y\_X derived mass estimates, we fit a Y\_SZ-M\_500 relation and find a slope consistent with the self-similar expectation of Y\_SZ ~ M^5/3 with a normalization consistent with predictions from other X-ray studies. We compare the X-ray mass estimates to previously published SZ mass estimates derived from cosmological simulations of the SPT survey. We find that the SZ mass estimates are lower by a factor of 0.89+-0.06, which is within the ~15% systematic uncertainty quoted for the simulation-based SZ masses.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1006.3068>)

[PDF](<https://arxiv.org/pdf/1006.3068.pdf>)