Deep $ugrizY$ imaging and DEEP2/3 spectroscopy: a photometric redshift testbed for LSST and public release of data from the DEEP3 Galaxy Redshift Survey
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- Department of Physics and Astronomy, University of Pittsburgh, 3941 O’Hara Street, Pittsburgh, PA 15260, USA; Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), Pittsburgh, PA 15260, USA
- Center for Cosmology, Department of Physics and Astronomy, University of California, 4129 Reines Hall, Irvine, CA 92697, USA
- Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
- Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE2 3RJ, UK
- Centre for Astronomy and Particle Theory, University of Nottingham, Nottingham NG7 2RD, UK
- Department of Astronomy, University of California, Berkeley, CA 94720, USA; Department of Physics, University of California, Berkeley, CA 94720, USA
- New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates
- UCO/Lick Observatory and Department of Astronomy and Astrophysics, University of California, Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA
- Astronomy Department, Orange Coast College, Costa Mesa, CA 92626, USA
- Department of Physics and Astronomy, Colby College, Waterville, ME 04961, USA
- Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstraße, D-85748 Garching, Germany
- Centre for Extragalactic Astronomy, Department of Physics, Durham University, Durham DH1 3LE, UK
- Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA
- Department of Physics, University of Connecticut, 2152 Hillside Road, Unit 3046, Storrs, CT 06269, USA
- MMT/Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA
- Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA
- Department of Physics and Astronomy, University of Kentucky, 505 Rose Street, Lexington, KY 40506-0055, USA
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.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); USDOE
- Contributing Organization:
- CFHTLS Collaboration
- Grant/Contract Number:
- AC02-05CH11231; SC0007914
- OSTI ID:
- 1556190
- Alternate ID(s):
- OSTI ID: 1580850
- Journal Information:
- Monthly Notices of the Royal Astronomical Society, Vol. 488, Issue 4; ISSN 0035-8711
- Publisher:
- Royal Astronomical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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