The Circinus Galaxy has been observed, for the first time above 10 keV, 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 similar to 4 x 10(24) cm(-2), i.e. large enough to completely block the radiation below 10 keV but small enough to permit partial transmission above this energy.

Matt, G., Guainazzi, M., Maiolino, R., Molendi, S., Perola, G.c., Antonelli, L.a., et al. (1999). One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays RID C-5880-2009. ASTRONOMY & ASTROPHYSICS, 341(2), L39-L42.

One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays RID C-5880-2009

MATT, Giorgio;
1999-01-01

Abstract

The Circinus Galaxy has been observed, for the first time above 10 keV, 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 similar to 4 x 10(24) cm(-2), i.e. large enough to completely block the radiation below 10 keV but small enough to permit partial transmission above this energy.
1999
Matt, G., Guainazzi, M., Maiolino, R., Molendi, S., Perola, G.c., Antonelli, L.a., et al. (1999). One more surprise from the Circinus Galaxy: BeppoSAX discovery of a transmission component in hard X-rays RID C-5880-2009. ASTRONOMY & ASTROPHYSICS, 341(2), L39-L42.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/132388
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