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

A. Mahabal; A. Ranjan; F. Combes; J.-K. Krogager; J. P. U. Fynbo; N. Gupta; P. Noterdaeme; P. Petitjean; R. Srianand

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

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arxiv 1802.00482 v1 pith:AEEDB576 submitted 2018-01-30 astro-ph.GA

J.-K. Krogager , N. Gupta , P. Noterdaeme , A. Ranjan , J. P. U. Fynbo , R. Srianand , P. Petitjean , F. Combes

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A. Mahabal

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keywords quasarsspectroscopicsurveymeerkatabsorptioncandidatesidentifyline

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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.

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