Fig. 2
Left: intermediate self-calibrated image of run G, at 8.4 GHz, after eight manual iterations of hybrid mapping with phase-only self-calibration. The beam is 1.96 mas × 1.14 mas at − 2°. Contour levels are − 4, 4, 5.66, 8, 11.3, 16, 22.6, 32, 45.2, 64σ, with 1σ = 0.18 mJy/beam. Right: output of automatic hybrid mapping by Muppet. Muppet switches on amplitude plus phase self-calibration after phase-only self-calibration cycles have converged. The beam is 1.96 mas × 1.14 mas at 1°. Contour levels are –4, 4, 5.66, 8, 11.3, 16, 22.6, 32, 45.2, 64, 90.5, 128, 181σ, with 1σ = 0.08 mJy/beam.
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