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À propos de : Complex absorption hides a Type II QSO in IRAS 13197-1627        

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  • Complex absorption hides a Type II QSO in IRAS 13197-1627
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  • 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 ≥2  $\times$ 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.
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  • aah4694
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  • © ESO, 2004
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  • ESO
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