A comparison of maps and power spectra determined from south pole telescope and planck data

Z. Hou, K. Aylor, B. A. Benson, L. E. Bleem, J. E. Carlstrom, C. L. Chang, H. M. Cho, R. Chown, T. M. Crawford, A. T. Crites, T. de Haan, M. A. Dobbs, W. B. Everett, B. Follin, E. M. George, N. W. Halverson, N. L. Harrington, G. P. Holder, W. L. Holzapfel, J. D. HrubesR. Keisler, L. Knox, A. T. Lee, E. M. Leitch, D. Luong-Van, D. P. Marrone, J. J. McMahon, S. S. Meyer, M. Millea, L. M. Mocanu, 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

Research output: Contribution to journalArticlepeer-review

Abstract

We study the consistency of 150 GHz data from the South Pole Telescope (SPT) and 143 GHz data from the Planck satellite over the patch of sky covered by the SPT-SZ survey. We rst visually compare the maps and find that the residuals appear consistent with noise after accounting for dierences in angular resolution and filtering. We then calculate (1) the cross-spectrum between two independent halves of SPT data, (2) the cross-spectrum between two independent halves of Planck data, and (3) the cross-spectrum between SPT and Planck data. We find the three cross-spectra are well-fit (PTE = 0.30) by the null hypothesis in which both experiments have measured the same sky map up to a single free calibration parameter|i.e., we find no evidence for systematic errors in either data set. As a by-product, we improve the precision of the SPT calibration by nearly an order of magnitude, from 2.6% to 0.3% in power. Finally, we compare all three cross-spectra to the full-sky Planck power spectrum and find marginal evidence for differences between the power spectra from the SPT-SZ footprint and the full sky. We model these differences as a power law in spherical harmonic multipole number. The best-fit value of this tilt is consistent among the three cross-spectra in the SPT-SZ footprint, implying that the source of this tilt is a sample variance uctuation in the SPT-SZ region relative to the full sky. The consistency of cosmological parameters derived from these datasets is discussed in a companion paper.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Apr 4 2017

Keywords

  • cosmic background radiation

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'A comparison of maps and power spectra determined from south pole telescope and planck data'. Together they form a unique fingerprint.

Cite this