Overall SEDs of PKS 0123+25. Besides our data (red points), we show the archival data collected from the ASI/SSDC database. We have indicated in green the XMM-Newton data, taken in January 2009, and in blue the Swift/XRT data taken simultaneously with the NuSTAR observation. The blue arrows in the γ-ray band are upper limits obtained integrating over 30 days (15 days before and 15 days after the NuSTAR observation). Red γ-ray points and arrows correspond to the average flux during the last 4 years. The lines are the result of the modeling (see text).