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BeppoSAX U.S. Coordination Facility

April 1999 from the BeppoSAX Calendar

Sun Mon Tue Wed Thu Fri Sat
                 1   2   3
 4   5   6   7   8   9  10
11  12  13  14  15  16  17
18  19  20  21  22  23  24
25  26  27  28  29  30

Spectra of 3c273 and MKN 3.
Emission regions in a Active Galactic Nuclei.

BeppoSAX broad-band X-Ray spectra of two Active Galactic Nuclei: the Quasar 3C273 and the Seyfert type 2 galaxy MKN 3. The spectral distibutions are similar above approximately 10 keV (PDS data) but very different at lower energies where intervening materials in MKN 3 absorbe most of the soft X-rays. Courtesy of M. Cappi, L. Bassani, TeSRE Institute, CNR, Bologna, Italy. Strongly different spectra such as those of 3C273 and MKN 3 can simply be the result of different source orientations as predicted by the "Unified Schemes of AGN". The diagram on the right side, adapted from Urry and Padovani, shows the basic assumptions of this theory. Courtesy of M. Polletta, ITESRE/CNR, Bologna, Italy

1999 BeppoSAX Calendar

Images courtesy of the Agenzia Spaziale Italiana (ASI) and the BeppoSAX Science Data Center (SDC).

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This file was last modified on Tuesday, 31-Jul-2001 14:08:35 EDT