MeerKAT Absorption Line Survey (MALS). I. DR1

The MeerKAT Absorption Line Survey (MALS) has observed 391 telescope pointings at the L band (900-1670MHz) at {delta}5 over an area of 2289deg^2^ (1132deg^2^) at 1006MHz (1381MHz). Every MALS pointing contains a central bright radio source (S_1GHz_>~0.2Jy). The median spatial resolution is 12" (8"). The median rms noise away from the pointing center is 25{mu}Jy/beam (22{mu}Jy/beam) and is within ~15% of the achievable theoretical sensitivity. The flux density scale ratio and astrometric accuracy deduced from multiply observed sources in MALS are 8), confirm the flattening of spectral indices with decreasing flux density, and identify 140 ultra-steep-spectrum ({alpha}{2). We have identified 1308 variable and 122 transient radio sources comprising primarily active galactic nuclei that demonstrate long-term (26yr) variability in their observed flux densities.

Cone search capability for table J/ApJS/270/33/catalog (The complete MeerKAT Absorption Line Survey (MALS) DR1 (v2) radio source catalog)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJS/270/33
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/270/33
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/270/33
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJS/270/33
Provenance
Creator Deka P.P.; Gupta N.; Jagannathan P.; Sekhar S.; Momjian E.; Bhatnagar S.,Wagenveld J.; Klockner H.-R.; Jose J.; Balashev S.A.; Combes F.,Hilton M.; Borgaonkar D.; Chatterjee A.; Emig K.L.; Gaunekar A.N.,Jozsa G.I.G.; Klutse D.Y.; Knowles K.; Krogager J.-K.; Mohapatra A.,Moodley K.; Muller S.; Noterdaeme P.; Petitjean P.; Salas P.,Sikhosana S.
Publisher CDS
Publication Year 2024
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; High Energy Astrophysics; Interstellar medium; Natural Sciences; Observational Astronomy; Physics