EDP Sciences
Free access
Volume 413, Number 3, January III 2004
Page(s) 921 - 927
Section Galactic structure and dynamics
DOI http://dx.doi.org/10.1051/0004-6361:20031561

A&A 413, 921-927 (2004)
DOI: 10.1051/0004-6361:20031561

Complex absorption hides a Type II QSO in IRAS 13197-1627

M. Dadina and M. Cappi

IASF-CNR Sezione di Bologna, via Gobetti 101, 40129 Bologna, Italy
    e-mail: dadina@bo.iasf.cnr.it;cappi@bo.iasf.cnr.it
(Received 28 July 2003 / Accepted 1 October 2003)

We report on the analysis of a BeppoSAX observation of IRAS 13197-1627. The complexity of the broad band (0.3-100 keV) spectrum of the source prevents us from selecting from two possible best-fit models, i.e. one based on a partial covering and the other on a reflection dominated scenario. Whatever the best fit model, the data imply that: 1) the primary spectrum is heavily obscured by at least two absorbers with column densities of the order of 5  $\times$ 10 23 cm -2 and $\geq$$\times$ 10 24 cm -2; 2) the intrinsic 2-10 keV luminosity of the source is at least ~2  $\times$ 10 44 erg s -1 thus making IRAS 13197-1627 a type-II QSO (more precisely a type 1.8 QSO) rather than a Seyfert 1.8 galaxy as previously classified. Furthermore, there is marginal evidence of an absorption line at $E \sim$ 7.5 keV suggesting a possible outflow with $v \sim$ 0.1c similar to recent findings on other QSOs and Seyferts.

Key words: galaxies: active -- galaxies: individual: IRAS 13197-1627 -- X-ray: quasar: general

Offprint request: M. Dadina, dadina@bo.iasf.cnr.it

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