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Fig. 9

image

Spectra of the two background galaxies, CGr30-237 (top) and CGr30-86 (bottom), in the blue wavelength range of MUSE. The blue vertical dashed lines correspond to the absorption lines at the redshift of the group (z ~ 0.724), whereas the red vertical dotted lines correspond to the absorption lines at the redshift of the galaxies (z ~ 0.938).

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