Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-11-07
Mon.Not.Roy.Astron.Soc. 329 (2002) L13
Astronomy and Astrophysics
Astrophysics
5 Latex pages, 5 figures, To appear in Monthly Notices of the Royal Astronomical Society (Letters)
Scientific paper
10.1046/j.1365-8711.2002.05132.x
In this paper, a BeppoSAX observation of the bright Seyfert 2 galaxy NGC6300 is presented. The rapidly variable emission from the active nucleus is seen through a Compton-thin (NH ~ 3x10^23 atomoms/cm/cm) absorber. A Compton-reflection component with an unusually high reflection fraction (R ~ 4.2), and the comparison with a reflection-dominated spectrum measured by RXTE two and half years earlier suggest that NGC6300 belongs to the class of "transient" AGN, undergoing long and repeated periods of low-activity. The spectral transition provides support to the idea that Compton-thick and Compton-thin X-ray absorbers in Seyfert 2 galaxies are decoupled, the former being most likely associated with the "torus", whereas the latter is probably located at much larger distances.
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