Abstract
The paper considers long term monitoring by Ariel V of the X-ray source
associated with the nucleus of the Seyfert Galaxy NGC4151 which revealed
frequent flaring on a time-scale of days. The possibility that all the
X-ray emission is contained in flare-like events is discussed within the
framework of a shot noise model. This behavior is interpreted in the
light of information obtained at other wavelengths, and arguments are
advanced to suggest that all emission from 1 keV to 3 MeV arises from
the same region of radius of about 10 to the 14th cm. It is also
suggested that accretion onto a massive collapsed object is required to
explain the efficiency of energy production.
| Original language | English |
|---|---|
| Pages (from-to) | 83-94 |
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume | 192 |
| Publication status | Published - 1 Jul 1980 |
Keywords / Materials (for Non-textual outputs)
- Flares
- Galactic Nuclei
- Periodic Variations
- Seyfert Galaxies
- Spaceborne Astronomy
- X Ray Sources
- X Ray Spectra
- Ariel 5 Satellite
- Autocorrelation
- Data Processing
- Gamma Ray Astronomy
- Light Curve
- Shot Noise
- Stellar Luminosity
- Variability