X-ray observations of the Compton-thick Seyfert 2 galaxy, NGC 5643

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[1] Matt, G.
[2] Bianchi, S.
[3] Marinucci, A.
[4] Guainazzi, M.
[5] Iwawasa, K.
[6] Jimenez Bailon, E.
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| 1600年 / EDP Sciences卷 / 556期
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We present results from a ∼55 ks long XMM-Newton observation of the obscured AGN; NGC; 5643; performed in July 2009. A previous; shorter (about 10 ks) XMM-Newton observation in February 2003 had left two major issues open; the nature of the hard X-ray emission (Compton-thin vs. Compton-thick) and of the soft X-ray excess (photoionized vs. collisionally ionized matter). The new observation shows that the source is Compton-thick and that the dominant contribution to the soft X-ray emission is by photoionized matter (even if it is still unclear whether collisionally ionized matter may contribute as well). We also studied three bright X-ray sources that are in the field of NGC 5643. The ULX NGC 5643 X-1 was confirmed to be very luminous; even if more than a factor 2 fainter than in 2003. We then provided the first high-quality spectrum of the cluster of galaxies Abell 3602. The last source; CXOJ143244.5-442020; is likely an unobscured AGN; possibly belonging to Abell 3602. © 2013 ESO;
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