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Title: The synergy between the dark energy survey and the South pole telescope

The Dark Energy Survey (DES) has recently completed its science verification (SV) phase, collecting data over 150 deg{sup 2} of sky. In this work we analyze to what extent it is beneficial to supplement the analysis of DES data with cosmic microwave background (CMB) lensing data. We provide forecasts for both DES-SV and for the full survey covering 5000 deg{sup 2}. We show that data presently available from DES-SV and SPT-SZ would allow a ∼8% measurement of the linear galaxy bias in three out of four redshift bins. We further show that a joint analysis of cosmic shear, galaxy density, and CMB lensing data allows to break the degeneracy between the shear multiplicative bias, the linear galaxy bias, and the normalization of the matter power spectrum. We show that these observables can thus be self-calibrated to the percent or sub-percent level, depending on the quality of available data and the fraction of overlap of the footprints and priors included in the analysis.
Authors:
 [1] ;  [2]
  1. Space Sciences Laboratory, University of California, Berkeley, CA 94720, USAAND (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
22341950
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 778; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COVERINGS; DENSITY; GALAXIES; NONLUMINOUS MATTER; RED SHIFT; RELICT RADIATION; SKY; SPECTRA; TELESCOPES; UNIVERSE; VERIFICATION