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http://hdl.handle.net/20.500.12386/31420
Title: | The Spectroscopic Follow-up of the QUBRICS Bright Quasar Survey | Authors: | Boutsia, Konstantina GRAZIAN, Andrea CALDERONE, GIORGIO CRISTIANI, Stefano CUPANI, Guido GUARNERI, FRANCESCO FONTANOT, Fabio Amorin, Ricardo D'ODORICO, Valentina GIALLONGO, Emanuele Salvato, Mara Omizzolo, Alessandro ROMANO, MICHAEL MENCI, Nicola |
Issue Date: | 2020 | Journal: | THE ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | Number: | 250 | Issue: | 2 | First Page: | 26 | Abstract: | We present the results of the spectroscopic follow-up of the QUasars as BRIght beacons for Cosmology in the Southern Hemisphere (QUBRICS; Calderone et al. 2019) survey. The selection method is based on a machine-learning approach applied to photometric catalogs, covering an area of ∼12,400 deg<SUP>2</SUP> in the Southern Hemisphere. The spectroscopic observations started in 2018 and identified 55 new, high-redshift (z ≥ 2.5), bright (i ≤ 18) quasi-stellar objects (QSOs), with the catalog published in late 2019. Here we report the current status of the survey, bringing the total number of bright QSOs at z ≥ 2.5 identified by QUBRICS to 224. The success rate of the QUBRICS selection method, in its most recent training, is estimated to be 68%. The predominant contaminant turns out to be lower-z QSOs at z < 2.5. This survey provides a unique sample of bright QSOs at high z available for a number of cosmological investigations. In particular, carrying out the redshift drift measurements (Sandage Test) in the Southern Hemisphere, using the High Resolution Spectrograph at the 39 m Extremely Large Telescope appears to be possible with less than 2500 hr of observations spread over 30 targets in 25 yr. | URI: | http://hdl.handle.net/20.500.12386/31420 | URL: | https://iopscience.iop.org/article/10.3847/1538-4365/abafc1 https://api.elsevier.com/content/abstract/scopus_id/85092537857 |
ISSN: | 0067-0049 | DOI: | 10.3847/1538-4365/abafc1 | Bibcode ADS: | 2020ApJS..250...26B | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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2008.03865.pdf | preprint | 1.34 MB | Adobe PDF | View/Open |
Boutsia_2020_ApJS_250_26.pdf | [Administrators only] | 1.78 MB | Adobe PDF |
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