Performance of the Quasar Spectral Templates for the Dark Energy Spectroscopic Instrument

Brodzeller, Allyson and Dawson, Kyle and Bailey, Stephen and Yu, Jiaxi and Ross, A. J. and Bault, A. and Filbert, S. and Aguilar, J. and Ahlen, S. and Alexander, David M. and Armengaud, E. and Berti, A. and Brooks, D. and Chaussidon, E. and de la Macorra, A. and Doel, P. and Fanning, K. and Fawcett, V. A. and Font-Ribera, A. and A Gontcho, S. Gontcho and Guy, J. and Honscheid, K. and Juneau, S. and Kehoe, R. and Kisner, T. and Kremin, Anthony and Lan, Ting-Wen and Landriau, M. and Levi, Michael E. and Magneville, C. and Martini, Paul and Meisner, Aaron M. and Miquel, R. and Moustakas, J. and Palanque-Delabrouille, N. and Percival, W. J. and Prada, F. and Ravoux, C. and Rossi, Graziano and Saulder, C. and Siudek, M. and Tarlé, Gregory and Weaver, B. A. and Youles, S. and Zheng, Zheng and Zhou, Rongpu and Zhou, Zhimin (2023) Performance of the Quasar Spectral Templates for the Dark Energy Spectroscopic Instrument. The Astronomical Journal, 166 (2). p. 66. ISSN 0004-6256

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Abstract

Millions of quasar spectra will be collected by the Dark Energy Spectroscopic Instrument (DESI), leading to a fourfold increase in the number of known quasars. High-accuracy quasar classification is essential to tighten constraints on cosmological parameters measured at the highest redshifts DESI observes (z > 2.0). We present spectral templates for identification and redshift estimation of quasars in the DESI Year 1 data release. The quasar templates are comprised of two quasar eigenspectra sets, trained on spectra from the Sloan Digital Sky Survey. The sets are specialized to reconstruct quasar spectral variation observed over separate yet overlapping redshift ranges and, together, are capable of identifying DESI quasars from 0.05 < z < 7.0. The new quasar templates show significant improvement over the previous DESI quasar templates regarding catastrophic failure rates, redshift precision and accuracy, quasar completeness, and the contamination fraction in the final quasar sample.

Item Type: Article
Subjects: Research Asian Plos > Physics and Astronomy
Depositing User: Unnamed user with email support@research.asianplos.com
Date Deposited: 15 Nov 2023 07:32
Last Modified: 17 Oct 2024 05:07
URI: http://abstract.stmdigitallibrary.com/id/eprint/2079

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