X-raying the Gamma-ray sky - preliminary results
Ezequiel J. Marchesini (Univ. La Plata, Argentina & Univ. Torino, Italia)
Wednesday 17/04/2019 @ 15:00, Sala riunioni II piano ex-IASF (Area della Ricerca CNR)
BL Lac objects are well-known multiwavelength emitters: they can be detected from gamma-ray to radio frequencies, showing a double-bump spectral energy distribution (SED). This has usually been explained with the synchrotron-self-Compton model. In particular, variations on the observed SEDs are the basis for what we now call the "Blazar sequence". The key to understand how these variations are originated may lie in the X-ray band, since it is usually the spectral range in which the emission regime change is observed. This has proven to be difficult to test, due to the lack of uniformity on the available X-ray data. In this talk, I will summarise the preliminary results of an extensive analysis on the X-ray properties of 334 gamma-ray detected BL Lacs from the Fermi 3LAC catalog with the use of Swift/XRT data.