The hard X-ray properties of the Seyfert nucleus in NGC 1365
| dc.creator | Risaliti, G. | |
| dc.creator | Maiolino, R. | |
| dc.creator | Bassani, L. | |
| dc.date | 2000-02-08 | |
| dc.date.accessioned | 2026-07-07T01:52:11Z | |
| dc.date.available | 2026-07-07T01:52:11Z | |
| dc.description | We present BeppoSAX observations of the Seyfert 1.8 galaxy NGC1365 in the 0.1--100 keV range. The source was 6 times brighter than during an ASCA observation 3 years earlier. The 4--10 keV flux is highly variable during the BeppoSAX observation, while the soft (0.1-4 keV) emission is constant within the errors. Both a cold and a warm reflector and a cold absorber are required to explain the observed spectrum. The comparison between ASCA and BeppoSAX spectra strongly suggests that the circumnuclear material has a more complex structure than a simple homogeneous torus, with quite different absorbing gas columns along different lines of sight. A broad iron K_alpha line is also present in the spectrum, with the peak energy significantly redshifted. This can be explained by means of a relativistic disk line model. Alternatively, a warm absorption Fe line system with N_H ~ 10^23 cm^(-2) could account for the observed line profile. | |
| dc.description | 8 LaTeX pages including 4 postscript figures. Accepted by A&A | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0002169 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0002169 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/540 | |
| dc.subject | Astrophysics | |
| dc.title | The hard X-ray properties of the Seyfert nucleus in NGC 1365 | |
| dc.type | text |