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Fig. 2.

image

NGC 4666 flux density measurements in the radio regime with a fit that gives a spectral slope of α = −0.68 ± 0.04. I: VLA Low-Frequency Sky Survey (VLSS, Cohen et al. 2007), II: GaLactic and Extragalactic All-sky MWA survey (GLEAM, Hurley-Walker et al. 2016), III: The Molonglo Reference Catalogue of Radio Sources (MRC, Large et al. 1981), IV: The NRAO VLA Sky Survey (NVSS, Condon et al. 1998), V: CHANG-ES (this work), VI: The Parkes-MIT-NRAO surveys (PMN, Griffith et al. 1995), VII: CHANG-ES (this work).

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