BeppoSAX observations of quasars

被引：0

作者：

Fiore, F ^{[1
]}

Mineo, T ^{[1
]}

Laor, A ^{[1
]}

Giallongo, E ^{[1
]}

机构：

[1] BeppoSAX Sci Data Ctr, I-00131 Rome, Italy

来源：

ACTIVE X-RAY SKY: RESULTS FROM BEPPOSAX AND RXTE | 1998年

关键词：

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results from recent BeppoSAX observations of low redshift (z<0.4, Po sample) and high redshift (2<z<4.5) radio-quiet and radio-loud quasars. Significant curvature has been detected in the spectra of the observed PGs: the spectrum flattens by 0.5 above 2 keV. The possible presence of narrow features in the MECS spectra is discussed. Intrinsic absorption has been measured in the z=3.9 radio-loud quasar 1745+624. The z=2.3 radio-quiet quasar HE1104-1805 has been found at a very low flux level, in comparison with previous ROSAT and ASCA observations, implying large (factor of similar to 4) variability on years timescales.

引用

页码：529 / 532

页数：4

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