The Duty-cycle of Gamma-ray Blazars: a New Approach, New Results

Details The Duty-cycle of Gamma-ray Blazars: a New Approach, New Results The Duty-cycle of Gamma-ray Blazars: a New Approach, New Results

2004-11-15

arxiv.org/abs/astro-ph/0411389v1

Mon.Not.Roy.Astron.Soc. 353 (2004) 890; AIP Conf.Proc. 745 (2005) 493-498

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures, to appear in the proceedings of the Gamma 2004 Symposium on High Energy Gamma Ray Astronomy, Heidelberg, J

Scientific paper

10.1111/j.1365-2966.2004.08119.x

We study several properties of blazars detected in the gamma-ray energy range by comparing the EGRET sources with a sample of radio blazars which can be considered possible gamma-ray candidates. We define three classes: non-gamma-ray blazars, blazars with quasi-steady gamma-ray emission, and gamma-ray blazars with substantial activity level. By combining the information of detected and candidate AGNs, we characterise the blazar activity, including the discovery of a region of consistency between the gamma-ray flaring duty-cycle and the recurrence time between flares. We also find a possible relation between the activity index of FSRQs and their black hole mass.

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