Observed visible to near-IR part of the SED of z1 (blue circles) and best-fit models to this spectral range: using the Polletta et al. (2007) templates and no additional extinction (green line), black lines: using the Chary & Elbaz (2001) and Bruzual & Charlot (2003) templates with variable attenuation described by the Calzetti law, magenta: same as black lines, but adoption the SMC extinction law, red line (continuum) and red crosses (synthetic flux in filters): Bruzual & Charlot (2003) templates with nebular emission and SMC law, black dashed: high-redshift (z = 7.5) template from Laporte et al. (2011, dashed line). In all cases the best-fit redshift is z ≈ 1.5–1.7, except for Polletta’s templates.