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arxiv: 2010.11280 · v1 · pith:2QMGA4PT · submitted 2020-10-21 · astro-ph.CO

Preliminary Target Selection for the DESI Quasar (QSO) Sample

Christophe Y\`eche , Nathalie Palanque-Delabrouille , Charles-Antoine Claveau , David D. Brooks , Edmond Chaussidon , Tamara M. Davis , Kyle S. Dawson , Arjun Dey
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Yutong Duan Sarah Eftekharzadeh Daniel J. Eisenstein Enrique Gazta\~naga Robert Kehoe Martin Landriau Dustin Lang Michael E. Levi Aaron M. Meisner Adam D. Myers Jeffrey A. Newman Claire Poppett Francisco Prada Anand Raichoor David J. Schlegel Michael Schubnell Ryan Staten Gregory Tarl\'e Rongpu Zhou
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keywords desiquasarquasarsalgorithmalphabandscandidatecolor
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The DESI survey will measure large-scale structure using quasars as direct tracers of dark matter in the redshift range $0.9<z<2.1$ and using quasar Ly-$\alpha$ forests at $z>2.1$. We present two methods to select candidate quasars for DESI based on imaging in three optical ($g, r, z$) and two infrared ($W1, W2$) bands. The first method uses traditional color cuts and the second utilizes a machine-learning algorithm.

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