Spectral energy distributions of flat-spectrum radio quasars observed with BeppoSAX

被引：45

作者：

Tavecchio, F

Maraschi, L

Ghisellini, G

Celotti, A

Chiappetti, L

Comastri, A

Fossati, G

Grandi, P

Pian, E

Tagliaferri, G

Treves, A

Sambruna, R

机构：

[1] Osserv Astron Brera, I-20121 Milan, Italy

[2] Osserv Astron Brera, I-23807 Merate, Italy

[3] SISSA, Inst Sch Adv Studies, I-34014 Trieste, Italy

[4] CNR, IFC, I-20133 Milan, Italy

[5] Osservatorio Astron Bologna, I-40127 Bologna, Italy

[6] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA

[7] CNR, IAS, I-00133 Rome, Italy

[8] Osserv Astron Trieste, I-24131 Trieste, Italy

[9] Univ Insubria, I-22100 Como, Italy

[10] George Mason Univ, Fairfax, VA 22030 USA

来源：

ASTROPHYSICAL JOURNAL | 2002年 / 575卷 / 01期

关键词：

quasars : general; quasars; individual; (QSO; 0208-512; QSO; 0521; 365; 1641+399; 2223; 052; 2243; 123; 2251+158); radiation mechanisms : nonthermal; X-rays : galaxies;

D O I：

10.1086/341212

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：137 / 144

页数：8

共 63 条

[1] DETECTION OF GAMMA-RAY EMISSION FROM THE QUASAR PKS 0208-512 [J].