SEDs of the submillimeter sources in the Spiderweb galaxy field. We show the best fitting hyperz template (dashed red line) and the best fit greybody curve (dotted blue line). Upper limits are indicated by blue arrows. Each plot reports on the spectroscopic redshift, if available, and gives the primary photo-z solution and the template used (in Table 3 the template number is defined). Based on this analysis, the protocluster membership of several sources has been verified.