An updated list of radio flux density calibrators

Astronomy and Astrophysics – Astrophysics

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Calibrating, Flux Density, Radio Emission, Spatial Distribution, Astronomical Maps, Stellar Spectra

Scientific paper

We present new flux densities in the range 0.7 cm less than or equal lambda less than or equal 21 cm for the radio sources in the calibrator list of Baars et al. (1977). Most of these sources show significant variability on the time scale of a decade, with the notable exception of 3C286 and 3C295. We use these sources to link our relative measurements to the absolute scale of Baars et al.; for the other sources we present updated spectra. We assess the suitability of the individual sources for use as flux density calibrators.

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