Table 2
Details of model sources (the A-team) used for all-sky self-calibration.
| Src | S60(Jy) | 74 MHz size | % Flux contribution | Comment |
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|
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| 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).