Long periodicity of Blazar with RXTE ASM, TA and HEGRA

Details Long periodicity of Blazar with RXTE ASM, TA and HEGRA Long periodicity of Blazar with RXTE ASM, TA and HEGRA

2002-11-29

arxiv.org/abs/astro-ph/0211640v2

Astronomy and Astrophysics

Astrophysics

7 pages, 11 figures, To appear in 'The Universe Viewed in Gamma-Rays'

Scientific paper

Long periodicity for Mkn501 during a large flare in 1997 have been reported by TA, HEGRA group. Here, we establish this periodicity with archival data of RXTE All Sky Monitor(ASM), Telescope Array(TA) and HEGRA with a chance probability less than $10^{-5}$. We also find that an origin of 23 day periodicity is related with a change of either a gamma factor of electrons $\gamma$ or the magnetic field or a beaming factor. And, in order to search for a category which have a long periodicity, we make a periodicity analysis for ten H.B.L. with RXTE ASM. We find a long periodicity for three TeV detected source, Mkn501, Mkn421 and PKS2155-304. There may exist a relation between an origin of a long periodicity and an electron acceleration to a TeV range.

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