The Circinus Galaxy has been observed, for the first time above 10keV, by BeppoSAX. An excess emission above the extrapolation of the best fit 0.1-10 keV spectrum is apparent in the PDS data. The most likely explanation is that we are observing the nucleus through a column density of ∼ 4 × 1024 cm-2, i.e. large enough to completely block the radiation below 10 keV but small enough to permit partial transmission above this energy.
|Original language||English (US)|
|Journal||Astronomy and Astrophysics|
|State||Published - Dec 1 1999|
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science