Ariel V sky survey: X-ray variability of NGC 5128
Open Access
- 1 November 1977
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 181 (1) , 93P-99P
- https://doi.org/10.1093/mnras/181.1.93p
Abstract
Long-term monitoring of the X-ray source associated with the nucleus of NGC 5128 has produced the most complete light curve in any frequency band for this peculiar active galaxy. The X-ray data indicate activity on at least two timescales: (i) a slow outburst with a timescale of 4–7 yr, (ii) superimposed flares with a timescale of 20–50 day. This pattern of behaviour is related to other X-ray active galaxies: specifically NGC 4151 (Seyfert) and MKN 421 (BL Lac). Some similarities are noted.Keywords
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