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Table 2

Details of model sources (the A-team) used for all-sky self-calibration.

Src S60(Jy) 74 MHz size % Flux contribution Comment

3C 461 (Cas A) 19605.31 7′ ~50 Spectra from (1), Decay from (2)
3C 405 (Cyg A) 19201.65 4.5′ ~42 Spectra from (1)
3C 144 (Tau A) 2417.31 8′ ~11 Spectra from (1)
3C 274 (Vir A) 1656.46 14′ ~8 Spectra from (2)

Notes. S60 has been generated using the spectral indices of Helmboldt et al. (2008), while a secular decrease in the flux of Cas A of 0.8% has been assumed. The fractional flux contribution of each model source to the flux in the observed snapshot visibilities assumes the flux of unmodeled sources adds incoherently due to a random sky distribution, along with a source density of ~66 sr-1 at 178 MHz.

Reference. (1) Baars et al. (1977); (2) Helmboldt et al. (2008).

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