Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 431, Issue 2, Pages 1547-1564Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stt276
Keywords
techniques: photometric; galaxies: distances and redshifts; galaxies: photometry; cosmological parameters; cosmology: observations; large-scale structure of Universe
Categories
Funding
- NSERC Research Tools and Instruments grant programme
- European Commissions Marie Curie Research Training Network DUEL [MRTN-CT-2006-036133]
- Canada Foundation for Innovation under Compute Canada
- Government of Ontario, Ontario Research Fund - Research Excellence
- University of Toronto
- Natural Sciences and Engineering Research Council of Canada
- European Research Council under the EC FP7 [240185, 279396]
- Deutsche Forschungsgemeinschaft [ER 327/3-1]
- Transregional Collaborative Research Centre TR 33 - 'The Dark Universe'
- Marie Curie IRG grant [230924]
- Netherlands Organization for Scientific Research (NWO) [639.042.814]
- Marie Curie IOF, a CITA National Fellowship [252760]
- DFG [Hi 1495/2-1]
- Royal Society University Research Fellowship (NSERC)
- Canadian Institute for Advanced Research (CIfAR, Cosmology and Gravity programme)
- CNRS/INSU (Institut National des Sciences de l'Univers)
- Programme National Galaxies et Cosmologie (PNCG)
- European Research Council [24067]
- NSF [AST-0444059-001]
- SAO [GO0-11147A]
- NWO
- NSFC [11103012, 10878003]
- Innovation Programme of SMEC [12ZZ134]
- Chen Guang project of SMEC [10CG46]
- STCSM [11290706600]
- Pujiang Programme [12PJ1406700]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Netherlands Organization for Scientific Research (NWO)
- Beecroft Institute for Particle Astrophysics and Cosmology
- Science and Technology Facilities Council [ST/H002456/1, ST/J001422/1] Funding Source: researchfish
- STFC [ST/H002456/1, ST/J001422/1] Funding Source: UKRI
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The Canada-France-Hawaii Telescope Lensing Survey (CFHTLenS) comprises deep multi-colour (u*g'r'i'z') photometry spanning 154 deg(2), with accurate photometric redshifts and shape measurements. We demonstrate that the redshift probability distribution function summed over galaxies provides an accurate representation of the galaxy redshift distribution accounting for random and catastrophic errors for galaxies with best-fitting photometric redshifts z(p) < 1.3. We present cosmological constraints using tomographic weak gravitational lensing by large-scale structure. We use two broad redshift bins 0.5 < z(p) <= 0.85 and 0.85 < z(p) <= 1.3 free of intrinsic alignment contamination, and measure the shear correlation function on angular scales in the range similar to 1-40 arcmin. We show that the problematic redshift scaling of the shear signal, found in previous Canada-France-Hawaii Telescope Legacy Survey data analyses, does not affect the CFHTLenS data. For a flat Lambda cold dark matter model and a fixed matter density Omega(m) = 0.27, we find the normalization of the matter power spectrum sigma(8) = 0.771 +/- 0.041. When combined with cosmic microwave background data (Wilkinson Microwave Anisotropy Probe 7-year results), baryon acoustic oscillation data (BOSS) and a prior on the Hubble constant from the Hubble Space Telescope distance ladder, we find that CFHTLenS improves the precision of the fully marginalized parameter estimates by an average factor of 1.5-2. Combining our results with the above cosmological probes, we find Omega(m) = 0.2762 +/- 0.0074 and sigma(8) = 0.802 +/- 0.013.
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