Fig. A.1.

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Region of 250″ × 250″ (∼123 kpc × 123 kpc) around the galaxy UGC929. The figure is a composite of an RGB image using the g, r, and z from DECaLS and a black and white g + r + z image for the background. This galaxy is at the same redshift as Nube, but is found 14.7′ to the northwest. The blue arrow indicates the direction of Nube. There is no evidence of morphological disturbance that could point to gas expulsion as the origin of Nube.

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