Consistency of cosmic microwave background temperature measurements in three frequency bands in the 2500-square-degree SPT-SZ survey

L. M. Mocanu, T. M. Crawford, K. Aylor, B. A. Benson, L. E. Bleem, J. E. Carlstrom, C. L. Chang, H. M. Cho, R. Chown, A. T. Crites, T. De Haan, M. A. Dobbs, W. B. Everett, E. M. George, N. W. Halverson, N. L. Harrington, J. W. Henning, G. P. Holder, W. L. Holzapfel, Z. HouJ. D. Hrubes, L. Knox, A. T. Lee, D. Luong-Van, D. P. Marrone, J. J. McMahon, S. S. Meyer, M. Millea, J. J. Mohr, T. Natoli, Y. Omori, S. Padin, C. Pryke, C. L. Reichardt, J. E. Ruhl, J. T. Sayre, K. K. Schaffer, E. Shirokoff, Z. Staniszewski, A. A. Stark, K. T. Story, K. Vanderlinde, J. D. Vieira, R. Williamson, W. L.K. Wu

Research output: Contribution to journalReview article

Abstract

We present an internal consistency test of South Pole Telescope (SPT) measurements of the cosmic microwave background (CMB) temperature anisotropy using three-band data from the SPT-SZ survey. These measurements are made from observations of ∼ 2500 °2 of sky in three frequency bands centered at 95, 150, and 220 GHz. We combine the information from these three bands into six semi-independent estimates of the CMB power spectrum (three single-frequency power spectra and three cross-frequency spectra) over the multipole range 650<ℓ<3000. We subtract an estimate of foreground power from each power spectrum and evaluate the consistency among the resulting CMB-only spectra. We determine that the six foreground-cleaned power spectra are consistent with the null hypothesis, in which the six cleaned spectra contain only CMB power and noise. A fit of the data to this model results in a χ2 value of 236.3 for 235 degrees of freedom, and the probability to exceed this χ2 value is 46%.

Original languageEnglish (US)
Article number038
JournalJournal of Cosmology and Astroparticle Physics
Volume2019
Issue number7
DOIs
StatePublished - Jul 24 2019

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Keywords

  • CMBR experiments
  • cosmological parameters from CMBR

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Cite this

Mocanu, L. M., Crawford, T. M., Aylor, K., Benson, B. A., Bleem, L. E., Carlstrom, J. E., Chang, C. L., Cho, H. M., Chown, R., Crites, A. T., De Haan, T., Dobbs, M. A., Everett, W. B., George, E. M., Halverson, N. W., Harrington, N. L., Henning, J. W., Holder, G. P., Holzapfel, W. L., ... Wu, W. L. K. (2019). Consistency of cosmic microwave background temperature measurements in three frequency bands in the 2500-square-degree SPT-SZ survey. Journal of Cosmology and Astroparticle Physics, 2019(7), [038]. https://doi.org/10.1088/1475-7516/2019/07/038