[Sc, Mn, Ni, Co/Fe] vs. [Fe/H]. Filled blue circles with error bars are our data for NGC 6440. Filled orange triangles represent bulge field stars (Barbuy et al. 2013; Johnson et al. 2014), filled gray triangles show halo and disk stars (Fulbright 2000; François et al. 2007; Reddy et al. 2003, 2006), and filled dark green triangles show NGC 6553 (Johnson et al. 2014).
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