# An XMM-Newton observation of Mrk 3 - a Seyfert galaxy just over the edge

Source: [An XMM-Newton observation of Mrk 3 - a Seyfert galaxy just over the edge](<https://www.sota2.com/research/paper/68fa1e027a2b558e2931e5ea>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-23T13:18:09.401Z

Authors: K.A. Pounds, K.L. Page

Published: 2005-04-14T15:25:55.000Z

## Abstract

A 100ks XMM-Newton observation of the nearby Seyfert 2 galaxy Mrk 3 offers a unique opportunity to explore the complexity of its X-ray spectrum. We find the \\~3-8 keV continuum to be dominated by reflection from cold matter, with fluorescent K-shell lines detected from Ni, Fe, Ca, Ar, S, Si and Mg. At higher energies an intrinsic power law continuum, with canonical Seyfert 1 photon index, is seen through a near-Compton-thick cold absorber. A soft excess below \\~3 keV is found to be dominated by line emission from an outflow of \`warm' gas, photo-ionised and photo-excited by the intrinsically strong X-ray continuum. Measured blue-shifts in the strong Fe K-alpha and OVII and VIII emission lines are discussed in terms of the properties of the putative molecular torus and ionised outflow.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/astro-ph/0504329>)

[PDF](<https://arxiv.org/pdf/astro-ph/0504329.pdf>)