A1 Refereed original research article in a scientific journal
Long-term radio variability of AGN: flare characteristics
Authors: Hovatta T, Nieppola E, Tornikoski M, Valtaoja E, Aller MF, Aller HD
Publisher: EDP SCIENCES S A
Publication year: 2008
Journal name in source: ASTRONOMY & ASTROPHYSICS
Journal acronym: ASTRON ASTROPHYS
Volume: 485
Issue: 1
First page : 51
Last page: 61
Number of pages: 11
ISSN: 0004-6361
DOI: https://doi.org/10.1051/0004-6361:200809806
Abstract
Results. The observations seem to adhere well to the shock model, but there is still large scatter in the data. Especially the time delays between different frequency bands are difficult to study due to the incomplete sampling of the higher frequencies. The average duration of the flares is 2.5 years at 22 and 37 GHz, which shows that long-term monitoring is essential for understanding the typical behaviour in these sources. It also seems that the energy release in a flare is independent of the duration of the flare.
Results. The observations seem to adhere well to the shock model, but there is still large scatter in the data. Especially the time delays between different frequency bands are difficult to study due to the incomplete sampling of the higher frequencies. The average duration of the flares is 2.5 years at 22 and 37 GHz, which shows that long-term monitoring is essential for understanding the typical behaviour in these sources. It also seems that the energy release in a flare is independent of the duration of the flare.
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