Spectral Energy Distributions of Flat-Spectrum Radio Quasars Observed with BeppoSAX
Abstract
We report the BeppoSAX observations of six flat-spectrum radio quasars. Three of them have a clear detection up to 100 keV with the PDS instrument. For four objects the X-ray spectrum is satisfactorily fitted by a power-law continuum with Galactic absorption. QSO 2251+158 shows the presence of absorption higher than the Galactic value, while the spectrum of the source QSO 0208-512 shows a complex structure, with evidence of absorption at low energy. We construct the spectral energy distributions adding historical data to the broadband X-ray spectra obtained with BeppoSAX and reproduce them with a one-zone synchrotron-inverse Compton model (including both synchrotron self-Compton and external Compton). The implications are briefly discussed.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- August 2002
- DOI:
- 10.1086/341212
- arXiv:
- arXiv:astro-ph/0207157
- Bibcode:
- 2002ApJ...575..137T
- Keywords:
-
- Galaxies: Quasars: General;
- quasars: individual (QSO 0208-512;
- QSO 0521-365);
- Galaxies: Quasars: Individual: Alphanumeric: QSO 1641+399;
- Galaxies: Quasars: Individual: Alphanumeric: QSO 2223-052;
- quasars: individual (QSO 2243-123;
- QSO 2251+158);
- Radiation Mechanisms: Nonthermal;
- X-Rays: Galaxies;
- Astrophysics
- E-Print:
- 5 figures