Title: Deep ugrizY imaging and DEEP2/3 spectroscopy: a photometric redshift testbed for LSST and public release of data from the DEEP3 Galaxy Redshift Survey

Abstract

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.

Authors:

Zhou, Rongpu  ^[1];

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Cooper, Michael C.  ^[2];

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Newman, Jeffrey A. ^[1]; Ashby, Matthew L. N. ^[3]; Aird, James  ^[4];

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Conselice, Christopher J. ^[5]; Davis, Marc ^[6]; Dutton, Aaron A.  ^[7];

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Faber, S. M. ^[8]; Fang, Jerome J. ^[9]; Fazio, G. G. ^[3]; Guhathakurta, Puragra ^[8]; Kocevski, Dale ^[10]; Koo, David C. ^[8]; Nandra, Kirpal ^[11]; Phillips, Andrew C. ^[8]; Rosario, David J. ^[12]; Schlafly, Edward F. ^[13]; Trump, Jonathan R. ^[14]; Weiner, Benjamin ^[15] more »; Willmer, Christopher N. A. ^[16]; Yan, Renbin ^[17] « less

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+ Show Author Affiliations

1. 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
2. Center for Cosmology, Department of Physics and Astronomy, University of California, 4129 Reines Hall, Irvine, CA 92697, USA
3. Center for Astrophysics | Harvard & Smithsonian, 60 Garden Street, Cambridge, MA 02138, USA
4. Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE2 3RJ, UK
5. Centre for Astronomy and Particle Theory, University of Nottingham, Nottingham NG7 2RD, UK
6. Department of Astronomy, University of California, Berkeley, CA 94720, USA, Department of Physics, University of California, Berkeley, CA 94720, USA
7. New York University Abu Dhabi, PO Box 129188, Abu Dhabi, United Arab Emirates
8. UCO/Lick Observatory and Department of Astronomy and Astrophysics, University of California, Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA
9. Astronomy Department, Orange Coast College, Costa Mesa, CA 92626, USA
10. Department of Physics and Astronomy, Colby College, Waterville, ME 04961, USA
11. Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstraße, D-85748 Garching, Germany
12. Centre for Extragalactic Astronomy, Department of Physics, Durham University, Durham DH1 3LE, UK
13. Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA
14. Department of Physics, University of Connecticut, 2152 Hillside Road, Unit 3046, Storrs, CT 06269, USA
15. MMT/Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA
16. Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721, USA
17. Department of Physics and Astronomy, University of Kentucky, 505 Rose Street, Lexington, KY 40506-0055, USA

Publication Date:

2019-07-25

Research Org.:

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Org.:

USDOE Office of Science (SC)

Contributing Org.:

CFHTLS Collaboration

OSTI Identifier:

1556190

Alternate Identifier(s):

OSTI ID: 1580850

Grant/Contract Number:  

SC0007914; AC02-05CH11231

Resource Type:

Published Article

Journal Name:

Monthly Notices of the Royal Astronomical Society

Additional Journal Information:

Journal Name: Monthly Notices of the Royal Astronomical Society Journal Volume: 488 Journal Issue: 4; Journal ID: ISSN 0035-8711

Publisher:

Oxford University Press

Country of Publication:

United Kingdom

Language:

English

Subject:

79 ASTRONOMY AND ASTROPHYSICS; catalogues; surveys; galaxies: distances and redshifts