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Issue A&A
Volume 402, Number 1, April IV 2003
Page(s) 141 - 149
Section Galactic structure and dynamics
DOI http://dx.doi.org/10.1051/0004-6361:20030210



A&A 402, 141-149 (2003)
DOI: 10.1051/0004-6361:20030210

The recent X-ray history of NGC 5506

S. Bianchi1, I. Balestra1, G. Matt1, M. Guainazzi2 and G. C. Perola1

1  Dipartimento di Fisica, Università degli Studi Roma Tre, Italy
2  XMM-Newton Science Operation Center/RSSD-ESA, Villafranca del Castillo, Spain

(Received 20 December 2002 / Accepted 11 February 2003 )

Abstract
We present a detailed discussion of the spectral and spatial components of NGC 5506, based on XMM-Newton, Chandra and BeppoSAX observations. The overall picture consists of a nucleus absorbed by cold gas with column density of $\approx$ 1022 cm -2 and surrounded by a Compton-thick torus, whose existence is inferred by a cold reflection component and an iron K $\alpha$ line. On a much larger scale, a photoionized gas extended on $\approx$ 350 pc reprocesses the nuclear radiation, producing a soft excess and ionized iron lines. Noteworthy, we find no evidence for the presence of the accretion disc.


Key words: galaxies: individual: NGC 5506 -- galaxies: Seyfert -- X-rays: galaxies

Offprint request: S. Bianchi, bianchi@fis.uniroma3.it

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© ESO 2003


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