Brodzeller, A;
Dawson, K;
Bailey, S;
Yu, J;
Ross, AJ;
Bault, A;
Filbert, S;
... Zhou, Z; + view all
(2023)
Performance of the Quasar Spectral Templates for the Dark Energy Spectroscopic Instrument.
Astronomical Journal
, 166
(2)
, Article 66. 10.3847/1538-3881/ace35d.
Preview |
Text
Brodzeller_2023_AJ_166_66.pdf - Published Version Download (3MB) | Preview |
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.
| Type: | Article |
|---|---|
| Title: | Performance of the Quasar Spectral Templates for the Dark Energy Spectroscopic Instrument |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3847/1538-3881/ace35d |
| Publisher version: | https://doi.org/10.3847/1538-3881/ace35d |
| Language: | English |
| Additional information: | Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10174758 |
Archive Staff Only
 |
View Item |
