CFHTLenS tomographic weak lensing: quantifying accurate redshift distributions

Jonathan Benjamin*, Ludovic Van Waerbeke, Catherine Heymans, Martin Kilbinger, Thomas Erben, Hendrik Hildebrandt, Henk Hoekstra, Thomas D. Kitching, Yannick Mellier, Lance Miller, Barnaby Rowe, Tim Schrabback, Fergus Simpson, Jean Coupon, Liping Fu, Joachim Harnois-Deraps, Michael J. Hudson, Konrad Kuijken, Elisabetta Semboloni, Sanaz VafaeiMalin Velander

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

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)

Original languageEnglish
Pages (from-to)1547-1564
Number of pages18
JournalMonthly Notices of the Royal Astronomical Society
Volume431
Issue number2
DOIs
Publication statusPublished - May 2013

Keywords

  • techniques: photometric
  • galaxies: distances and redshifts
  • galaxies: photometry
  • cosmological parameters
  • cosmology: observations
  • large-scale structure of Universe
  • OBSERVATIONS COSMOLOGICAL INTERPRETATION
  • PHOTOMETRIC GALAXY SAMPLES
  • DARK-ENERGY CONSTRAINTS
  • COSMIC SHEAR
  • INTRINSIC CORRELATION
  • POWER SPECTRA
  • WIDE-FIELD
  • COVARIANCE
  • TELESCOPE
  • ERRORS

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