Fig. 4.
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CIE model scan performed on the four analysed datasets, adopting a velocity dispersion of 250 km/s. The colours show indication of the ΔC-stat improvement compared to the continuum-only model. The black contours refer to significance levels from 2.5 to 3.5σ with steps of 0.5σ estimated with Monte Carlo simulations (see Section 4.4).
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