Complex absorption hides a Type II QSO in IRAS 13197-1627
IASF-CNR Sezione di Bologna, via Gobetti 101, 40129 Bologna, Italy e-mail: dadina@bo.iasf.cnr.it;cappi@bo.iasf.cnr.it
Corresponding author: M. Dadina, dadina@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 
1023 cm-2 and
≥2 1024 cm-2; 2) the intrinsic 2–10 keV luminosity of
the source is at least ~2 1044 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 
7.5 keV suggesting a possible outflow
with 
0.1c similar to recent findings on other QSOs and Seyferts.
Key words: galaxies: active / galaxies: individual: IRAS 13197-1627 / X-ray: quasar: general
© ESO, 2004