Extended Data Fig. 3: Spectra of the C-19 member stars observed with OSIRIS, normalized using a running mean filter after removing the velocity signal in the rest frame (black lines), together with the best fit (blue lines) derived by adopting a fitting procedure.
From: A stellar stream remnant of a globular cluster below the metallicity floor

The metallicity, [Fe/H], computed from [M/H] and [Ca/H] is also indicated for each target (see the text for more details).