Volume 411, Number 2, November IV 2003
|Page(s)||77 - 82|
|Published online||17 November 2003|
BeppoSAX observations of Seyfert 1s in the Piccinotti sample
I. poorly studied sources
IASF/CNR, via Piero Gobetti 101, 40129 Bologna, Italy
Corresponding author: A. Quadrelli, email@example.com
Accepted: 15 September 2003
In this work we present the first of two papers devoted to the study of the X-ray spectral characteristics of Seyfert 1 galaxies in the Piccinotti sample. In particular we analyse here the BeppoSAX broad band (0.1–100 keV) data of 4 objects which, despite their X-ray brightness, have been historically poorly studied due to their late identification with an AGN; these are H0111-149 (MKN 1152), H0235-525 (ESO 198-G24), H0557-385 (IRAS F05563-3820) and H1846-786 (IRAS F18389-7834). We have assumed for all the sources a baseline model which includes a power law with an exponential cut-off plus a reflection component and an iron Kα line; we have also searched for the presence of intrinsic absorption and/or a soft excess component. Our analysis indicates the presence of complex absorption in two objects (H0557-385 and H0111-149) best described by a combination of two uniform absorbers, one cold and one warm. Only in one source, H0557-385, a soft excess component has been measured. The primary continuum is best described by a canonical power law () with a high energy cut-off in the range 40–130 keV. A cold reflection component is likely present in all sources with values ranging from less than 0.6 to higher than 2. In 3 out of 4 objects we find a cold iron line having equivalent width typical of Seyfert 1s (100–200 eV).
Key words: X-rays: galaxies / galaxies: Seyfert / galaxies: general
© ESO, 2003
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