Fig. 1.
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Color-composite images from DESI Legacy Survey Sky Viewer showing the local environment of NGC 6860 (left), Mrk 915 (middle) and MCG -01-24-012 (right), with squares marking the FoV of Figs. 2a, 3a and 4a. The spectroscopic redshifts of the brighter sources correspond to the preferred values from the NASA/IPAC Extragalactic Database. North is up and east is left in this and the remaining figures in the paper.
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