Spectral Energy Distributions of Flat Spectrum Radio Quasars observed   with BeppoSAX
  We report the BeppoSAX observations of 6 Flat Spectrum Radio Quasars. Three of them have a clear detection up to 100 keV with the PDS instrument. For 4 objects the X-ray spectrum is satisfactorily fitted by a power-law continuum with Galactic absorption. 2251+158 show the presence of absorption higher than the galactic value, while the spectrum of the source 0208-512 shows a complex structure, with evidence of absorption at low energy. We construct the Spectral Energy Distributions adding historical data to the broad band X-ray spectra obtained with $Beppo$SAX and reproduce them with a one-zone Synchrotron-Inverse Compton model (including both SSC and External Compton). The implications are briefly discussed. 
F. Tavecchio, L. Maraschi, G. Ghisellini, A. Celotti, L. Chiappetti,   A. Comastri, G. Fossati, P. Grandi, E. Pian, G. Tagli...