The recently completed first sixth of GLASS — a 5-9GHz survey with the ATCA on the well-covered GAMA 23 field — allows us to start exploring the radio spectral energy distributions (SEDs) of thousands of radio sources over more than two decades of frequency. The characterization of the radio SEDs in complement of the wealth of multi-wavelength dataset (from optical to far-IR) will reveal properties of supermassive black holes and their galaxy hosts. In this project, we focus on isolating a catalogue on compact radio sources selected at 9GHz and building their radio SEDs. We will explore the properties of their radio SEDs by fitting different models and compare their optical/infrared properties to search for trends in this specific population.
