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Fig. 8.

Redshift histogram of 718 galaxies selected in a 4° ×4° box centred on NGC 4104 with redshift between 0.001 and 0.1 from SDSS. There are at least three more structures on the line-of-sight. Focusing on the NGC 4104 structure (0.015 < z < 0.04), we have z̅ = 0.0278 and σz = 0.00304 (148 galaxies).
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