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

Research and Scientific Support Department, European Space Agency – Postbus 299, 2200 AG Noordwijk, The Netherlands

Corresponding author: P. Gondoin, pgondoin@rssd.esa.int

Received: 10 July 2002
Accepted: 13 November 2002

Abstract

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 () than that of a typical broad-line Seyfert 1 galaxy. The spectrum shows a weak emission line at 6.45 ± 0.04 keV with a measured equivalent width of ≈40 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.