{
  "id": "2410.14119",
  "version": "v1",
  "published": "2024-10-18T02:20:08.000Z",
  "updated": "2024-10-18T02:20:08.000Z",
  "title": "A Comprehensive Analysis of Insight-HXMT Gamma-Ray Burst Data. I. Power Density Spectrum",
  "authors": [
    "Zi-Min Zhou",
    "Xiang-Gao Wang",
    "En-Wei Liang",
    "Jia-Xin Cao",
    "Hui-Ya Liu",
    "Cheng-Kui Li",
    "Bing Li",
    "Da-Bin Lin",
    "Tian-Ci Zheng",
    "Rui-Jing Lu"
  ],
  "journal": "2024, apj, 972, 190.",
  "doi": "10.3847/1538-4357/ad5f90",
  "categories": [
    "astro-ph.HE",
    "hep-ph"
  ],
  "abstract": "Power Density Spectrum (PDS) is one of the powerful tools to study light curves of gamma-ray bursts (GRBs). We show the average PDS and individual PDS analysis with {\\it Hard X-ray Modulation Telescope} (also named \\insighthxmt) GRBs data. The values of power-law index of average PDS ($\\alpha_{\\bar{P}}$) for long GRBs (LGRBs) vary from 1.58-1.29 (for 100-245, 245-600, and 600-2000 keV). The \\insighthxmt\\ data allow us to extend the energy of the LGRBs up to 2000 keV, and a relation between $\\alpha_{\\bar{P}}$ and energy $E$, $\\alpha_{\\bar{P}}\\propto E^{-0.09}$ (8-2000 keV) is obtained. We first systematically investigate the average PDS and individual PDS for short GRBs (SGRBs), and obtain $\\alpha_{\\bar{P}}\\propto E^{-0.07}$ (8-1000 keV), where the values of $\\alpha_{\\bar{P}}$ vary from 1.86 to 1.34. The distribution of power-law index of individual PDS ($\\alpha$) of SGRB, is consistent with that of LGRB, and the $\\alpha$ value for the dominant timescale group (the bent power-law, BPL) is higher than that for the no-dominant timescale group (the single power-law, PL). Both LGRBs and SGRBs show similar $\\alpha$ and $\\alpha_{\\bar{P}}$, which indicates that they may be the result of similar stochastic processes. The typical value of dominant timescale $\\tau$ for LGRBs and SGRBs is 1.58 s and 0.02 s, respectively. It seems that the $\\tau$ in proportion to the duration of GRBs $T_{90}$, with a relation $\\tau \\propto T_{90}^{0.86}$. The GRB light curve may result from superposing a number of pulses with different timescales. No periodic and quasi-periodical signal above the 3$\\sigma$ significance threshold is found in our sample.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-10-18T02:20:08.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "insight-hxmt gamma-ray burst data",
      "power density spectrum",
      "comprehensive analysis",
      "average pds",
      "individual pds"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}