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MALS-NOT: Identifying Radio-Bright Quasars for the MeerKAT Absorption Line Survey

Authors :
Francoise Combes
Patrick Petitjean
Pasquier Noterdaeme
A. Ranjan
Raghunathan Srianand
N. Gupta
Ashish Mahabal
Johan P. U. Fynbo
J.-K. Krogager
Institut d'Astrophysique de Paris (IAP)
Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
Inter-University Centre for Astronomy and Astrophysics [Pune] (IUCAA)
Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA (UMR_8112))
Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Cergy Pontoise (UCP)
Université Paris-Seine-Université Paris-Seine-Observatoire de Paris
Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)
Chaire Galaxies et cosmologie
Collège de France (CdF (institution))
Source :
Astrophysical Journal Supplement, Astrophysical Journal Supplement, American Astronomical Society, 2018, 235 (1), pp.10. ⟨10.3847/1538-4365/aaab51⟩
Publication Year :
2018
Publisher :
arXiv, 2018.

Abstract

We present a preparatory spectroscopic survey to identify radio-bright, high-redshift quasars for the MeerKAT Absorption Line Survey (MALS). The candidates have been selected on the basis of a single flux density limit at 1.4 GHz (>200 mJy) together with mid-infrared color criteria from the Wide-field Infrared Survey Explorer (WISE). Through spectroscopic observations using the Nordic Optical Telescope, we identify 72 quasars out of 99 candidates targeted. We measure the spectroscopic redshifts based on characteristic, broad emission lines present in the spectra. Of these 72 quasars, 64 and 48 objects are at sufficiently high redshift (z>0.6 and z>1.4) to be used for the L-band and UHF-band spectroscopic follow-up with the Square Kilometre Array (SKA) precursor in South Africa: the MeerKAT.<br />Accepted for publication in ApJS. Supplementary figure sets available in the source files

Details

ISSN :
00670049 and 15384365
Database :
OpenAIRE
Journal :
Astrophysical Journal Supplement, Astrophysical Journal Supplement, American Astronomical Society, 2018, 235 (1), pp.10. ⟨10.3847/1538-4365/aaab51⟩
Accession number :
edsair.doi.dedup.....eaf8987c445c60e034069e69034f9853
Full Text :
https://doi.org/10.48550/arxiv.1802.00482