{
  "id": "2206.10269",
  "version": "v1",
  "published": "2022-06-21T11:36:33.000Z",
  "updated": "2022-06-21T11:36:33.000Z",
  "title": "About 300 days optical quasi-periodic oscillations in the long-term light curves of the blazar PKS 2155-304",
  "authors": [
    "Qi Zheng",
    "Xueguang Zhang",
    "Qirong Yuan"
  ],
  "comment": "13 pages, 9 figures, accepted to be published in RAA",
  "categories": [
    "astro-ph.HE",
    "astro-ph.GA"
  ],
  "abstract": "Based on the long-term light curves collected from the Catalina Sky Survey (CSS) (from 2005 to 2013) and the All-Sky Automated Survey for Supernovae (ASAS-SN) (from 2014 to 2018), optical quasi-periodic oscillations (QPOs) about 300 days can be well determined in the well-known blazar PKS~2155-304 through four different methods: the generalized Lomb-Scargle periodogram (GLSP) method, the weighted wavelet Z-transform (WWZ) technique, the epoch-folded method and redfit method. The GLSP determined significance level for the periodicity is higher than 99.9999\\% based on a false alarm probability. The redfit provided confidence level for the periodicity is higher than 99\\% in ASAS-SN light curve, after considering the effects of red noise. Based on continuous autoregressive (CAR) process created artificial light curves, the probability of detecting fake QPOs is lower than 0.8\\%. The determined optical periodicity of 300 days from CSS and ASAS-SN light curves is well consistent with the reported optical periodicity in the literature. Moreover, three possible models are discussed to explain the optical QPOs in PKS 2155-304: the relativistic Frame-dragging effect, the binary black hole (BBH) model and the jet precession model.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2022-06-21T11:36:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "long-term light curves",
      "days optical quasi-periodic oscillations",
      "blazar pks",
      "asas-sn light curve",
      "process created artificial light curves"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}