Digital Sky Survey image of the central regions of the Hydra I cluster. The two brightest galaxies NGC 3311 and NGC 3309 are labeled. The thick black line represents the location of the FORS2 long slit. The orange circle marks the slit center on top of the dwarf galaxy HCC 26. The spectrum of HCC 26 was extracted from the central 6” (see text for details). The colored lines identify the location of the five slit sections (bins A–E) where we extracted the spectra of the halo of NGC 3311. Thin continuous, dashed and dotted lines represent approximately the contours of a photometric substructure found by Arnaboldi et al. (2011). We adopt a distance to NGC 3311 of 51 Mpc, from the NASA/IPAC extragalactic database.