SED of the afterglow of the dark GRB 051022. Filled dots mark detections while empty dots and arrow mark detection limits. In blue we draw a synchrotron spectrum that can explain the radio and X-ray emission, while the optical/nIR data (10¹⁴⁻¹⁵ Hz) lie well bellow. Adding a Small Magellanic Cloud (SMC) extinction of A_V ~ 15 results in a SED (red dotted line) consistent with all the data (data obtained from Cameron & Frail 2005; Bremer et al. 2005; Castro-Tirado et al. 2007).