SIMBAD references

1999A&A...341L..39M - Astronomy and Astrophysics, volume 341, L39-42 (1999/1-2)

One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays.

MATT G., GUAINAZZI M., MAIOLINO R., MOLENDI S., PEROLA G.C., ANTONELLI L.A., BASSANI L., BRANDT W.N., FABIAN A.C., FIORE F., IWASAWA K., MALAGUTI G., MARCONI A. and POUTANEN J.

Abstract (from CDS):

The Circinus Galaxy has been observed, for the first time above 10keV, by BeppoSAX. An excess emission above the extrapolation of the best fit 0.1-10keV spectrum is apparent in the PDS data. The most likely explanation is that we are observing the nucleus through a column density of ∼4x1024cm–2, i.e. large enough to completely block the radiation below 10keV but small enough to permit partial transmission above this energy.

Abstract Copyright: ∼

Journal keyword(s): X-rays: galaxies - galaxies: Seyfert - galaxies: individual: Circinus

Simbad objects: 2

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