Speaker
Description
The modelling of the spectral energy distribution (SED) of some high-frequency peaked BL Lac objects (HBLs) has proved challenging for the so-called extreme candidates, which can have their TeV peak at energies
In this work, using archival VERITAS data from 2008 to 2021 on 1ES 1218+304 and 1ES 0229+200 combined with data from the Swift-XRT and Fermi-LAT observatories for extended wavelength coverage, we provide an updated look on the modelling of extreme HBLs.