XMM-Newton observations of the Seyfert 1 galaxy ESO 141-G55

被引：13

作者：

Gondoin, P ^{[1
]}

Orr, A ^{[1
]}

Lumb, D ^{[1
]}

机构：

[1] European Space Agcy, Res & Sci Support Dept, NL-2200 AG Noordwijk, Netherlands

来源：

ASTRONOMY & ASTROPHYSICS | 2003年 / 398卷 / 03期

关键词：

galaxies : individual : ESO 141-G55; galaxies : nuclei; galaxies : Seyfert;

D O I：

10.1051/0004-6361:20021694

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on an observation of the Seyfert 1 galaxy ESO 141-G55 performed in October 2001 with the EPIC MOS cameras and Reflection Grating Spectrometers (RGS) on board the XMM-Newton observatory. We find the hard (3-10 keV) continuum slope, including reflection, to be somewhat flatter (Gamma = 1.72 +/- 0.06) than that of a typical broad-line Seyfert I galaxy. The spectrum shows a weak emission line at 6.45 +/- 0.04 keV with a measured equivalent width of approximate to40 eV. A broad spectral feature is observed around 7 keV that can be fitted by an absorption edge at 7.6 +/- 0.1 keV. The extrapolation of the primary power law continuum to energies lower than 2 keV indicates the presence of a soft excess component contributing to 45 +/- 3% of the overall flux in the 0.3-2.0 keV energy range. This soft-excess cannot be explained solely by enhanced reflection from a highly ionized disk.

引用

页码：967 / 973

页数：7

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