The VIMOS Public Extragalactic Redshift Survey (VIPERS) An unprecedented view of galaxies and large-scale structure at 0.5 <z <1.2

L. Guzzo*, M. Scodeggio, B. Garilli, B. R. Granett, A. Fritz, U. Abbas, C. Adami, S. Arnouts, J. Bel, M. Bolzonella, D. Bottini, E. Branchini, A. Cappi, J. Coupon, O. Cucciati, I. Davidzon, G. De Lucia, S. de la Torre, P. Franzetti, M. FumanaP. Hudelot, O. Ilbert, A. Iovino, J. Krywult, V. Le Brun, O. Le Fevre, D. Maccagni, K. Malek, F. Marulli, H. J. McCracken, L. Paioro, J. A. Peacock, M. Polletta, A. Pollo, H. Schlagenhaufer, L. A. M. Tasca, R. Tojeiro, D. Vergani, G. Zamorani, A. Zanichelli, A. Burden, C. Di Porto, A. Marchetti, C. Marinoni, Y. Mellier, L. Moscardini, R. C. Nichol, W. J. Percival, S. Phleps, M. Wolk

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We describe the construction and general features of VIPERS, the VIMOS Public Extragalactic Redshift Survey. This ESO Large Programme is using the Very Large Telescope with the aim of building a spectroscopic sample of similar to 100 000 galaxies with i(AB) <22.5 and 0.5 <z <1.5. The survey covers a total area of similar to 24 deg(2) within the CFHTLS-Wide W1 and W4 fields. VIPERS is designed to address a broad range of problems in large-scale structure and galaxy evolution, thanks to a unique combination of volume (similar to 5x10(7) h(-3) Mpc(3)) and sampling rate (similar to 40%), comparable to state-of-the-art surveys of the local Universe, together with extensive multi-band optical and near-infrared photometry. Here we present the survey design, the selection of the source catalogue and the development of the spectroscopic observations. We discuss in detail the overall selection function that results from the combination of the different constituents of the project. This includes the masks arising from the parent photometric sample and the spectroscopic instrumental footprint, together with the weights needed to account for the sampling and the success rates of the observations. Using the catalogue of 53 608 galaxy redshifts composing the forthcoming VIPERS Public Data Release 1 (PDR-1), we provide a first assessment of the quality of the spectroscopic data. The stellar contamination is found to be only 3.2%, endorsing the quality of the star-galaxy separation process and fully confirming the original estimates based on the VVDS data, which also indicate a galaxy incompleteness from this process of only 1.4%. Using a set of 1215 repeated observations, we estimate an rms redshift error sigma(z)/(1 + z) = 4.7x10(-4) and calibrate the internal spectral quality grading. Benefiting from the combination of size and detailed sampling of this dataset, we conclude by presenting a map showing in unprecedented detail the large-scale distribution of galaxies between 5 and 8 billion years ago.

Original languageEnglish
Article number108
Number of pages21
JournalAstronomy & Astrophysics
Volume566
DOIs
Publication statusPublished - Jun 2014

Keywords

  • cosmology: observations
  • large-scale structure of Universe
  • galaxies: distances and redshifts
  • galaxies: statistics
  • OSCILLATION SPECTROSCOPIC SURVEY
  • DIGITAL SKY SURVEY
  • VLT DEEP SURVEY
  • BARYON ACOUSTIC-OSCILLATIONS
  • DARK ENERGY SURVEY
  • DATA RELEASE
  • SDSS-III
  • COSMOLOGICAL CONSTANT
  • SPACE DISTORTIONS
  • STELLAR MASS

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