Deep ugrizY imaging and DEEP2/3 spectroscopy: A photometric redshift testbed for LSST and public release of data from the DEEP3 galaxy redshift survey

Rongpu Zhou, Michael C. Cooper, Jeffrey A. Newman, Matthew L.N. Ashby, James Aird, Christopher J. Conselice, Marc Davis, Aaron A. Dutton, S. M. Faber, Jerome J. Fang, G. G. Fazio, Puragra Guhathakurta, Dale Kocevski, David C. Koo, Kirpal Nandra, Andrew C. Phillips, David J. Rosario, Edward F. Schlafly, Jonathan R. Trump, Benjamin WeinerChristopher N.A. Willmer, Renbin Yan

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We present catalogues of calibrated photometry and spectroscopic redshifts in the Extended Groth Strip, intended for studies of photometric redshifts (photo-z's). The data includes ugriz photometry from Canada-France-Hawaii Telescope Legacy Survey (CFHTLS) and Y-band photometry from the Subaru Suprime camera, as well as spectroscopic redshifts from the DEEP2, DEEP3, and 3D-HST surveys. These catalogues incorporate corrections to produce effectively matched-aperture photometry across all bands, based upon object size information available in the catalogue and Moffat profile point spread function fits. We test this catalogue with a simple machine learning-based photometric redshift algorithm based upon Random Forest regression, and find that the corrected aperture photometry leads to significant improvement in photo-z accuracy compared to the original SEXTRACTOR catalogues from CFHTLS and Subaru. The deep ugrizY photometry and spectroscopic redshifts are well suited for empirical tests of photometric redshift algorithms for LSST. The resulting catalogues are publicly available at http://d-scholarship.pitt.edu/36064/. We include a basic summary of the strategy of the DEEP3 Galaxy Redshift Survey to accompany the recent public release of DEEP3 data.

Original languageEnglish
Pages (from-to)4565-4584
Number of pages20
JournalMonthly Notices of the Royal Astronomical Society
Volume488
Issue number4
DOIs
StatePublished - Oct 1 2019

Bibliographical note

Publisher Copyright:
© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Keywords

  • Catalogues
  • Galaxies: distances
  • Redshifts
  • Surveys

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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