Evidence for a QPO structure in the TeV and X-ray light curve during the 1997 high state Gamma emission of Mkn 501

(2) Potchefstroom University for CHE; D.Kranich (1); E. Lorenz (1); Germany; M. Kestel (1); O.C. De Jager (2); South Africa); the HEGRA Collaboration ((1) Max-Planck-Institut f\"ur Physik

arxiv: astro-ph/9907205 · v1 · submitted 1999-07-15 · 🌌 astro-ph

Evidence for a QPO structure in the TeV and X-ray light curve during the 1997 high state Gamma emission of Mkn 501

D.Kranich (1) , O.C. De Jager (2) , M. Kestel (1) , E. Lorenz (1) , the HEGRA Collaboration ((1) Max-Planck-Institut f\"ur Physik , Germany , (2) Potchefstroom University for CHE , South Africa) This is my paper

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keywords duringevidenceanalysisdatafoundhighobjectperiodicity

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The BL Lac Object Mkn 501 was in a state of high activity in the TeV range in 1997. During this time Mkn 501 was observed by all Cherenkov-Telescopes of the HEGRA-Collaboration. Part of the data were also taken during moonshine thus providing a nearly continuous coverage for this object in the TeV-range. We have carried out a QPO analysis and found evidence for a 23 day periodicity. We applied the same analysis on the 'data by dwell' x-ray lightcurve from the RXTE/ASM database and found also evidence for the 23 day periodicity. The combined probability was P = 2.8 *10^-4.

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Evidence for a QPO structure in the TeV and X-ray light curve during the 1997 high state Gamma emission of Mkn 501

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