{
  "abstract": "We analyse the AstroSat Soft X-ray Telescope (SXT) observation of the high-synchrotron-peaked blazar 1ES 1959+650 taken on 2023 September 2, which covers 362 ks with about 95 ks of good exposure. We build 0.6-7 keV light curves in six sub-bands, binned at 5830 s (the orbital period) and 1000 s. All sub-bands show excess variance, with fractional variability of 3.7 to 6.5 per cent that increases with energy ($\\propto E^{0.32\\pm0.07}$). The power spectrum of the total band, fitted with a model that includes the window function of the orbital gaps, is a red-noise power law with slope $-1.80$ (95 per cent range $-2.8$ to $-1.4$). A Lomb-Scargle search finds no significant periodicity (global $p>0.57$) and would have detected, with 90 per cent probability, a sinusoid with an rms amplitude above 1.9 to 3.7 per cent at periods of 3 to 50 ks. The soft (0.6-1.4 keV) and hard (1.9-7 keV) light curves are correlated near zero lag, but only marginally (global $p=0.04$ and 0.07 for power-spectrum slopes of $-1.7$ and $-2.0$), and the lag is $-1^{+6}_{-10}$ ks, consistent with zero. No pair of sub-bands that includes 0.6-0.8 keV shows a significant correlation or lag, so an energy-dependent lag of a few ks can be neither confirmed nor excluded. The 0.6-7 keV light curve contains one hump with rise and decay times of about 0.4 to 0.6 d, which is only marginally distinguishable from red noise ($p\\approx0.05$ to $0.07$). The count rate distribution is consistent with a lognormal distribution, and the hardness ratio does not depend significantly on flux.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.27708",
  "author_total": 2,
  "authors": [
    {
      "name": "Sikandar Akbar"
    },
    {
      "name": "Zahir Shah"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5dz1femetqbqx.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.27708",
  "fulltext_url": null,
  "id": "5dz1femetqbqx",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.27708",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "openalex",
      "3106|Astrophysics and Cosmic Phenomena"
    ]
  ],
  "openalex": "W7223124575",
  "pdf_url": "https://arxiv.org/pdf/2610.27708",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-20",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5dz1femetqbqx.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:04Z",
      "native_id": "2610.27708",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.27708"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Short-timescale X-ray variability of the blazar 1ES 1959+650 observed with AstroSat/SXT",
  "title_text": "Short-timescale X-ray variability of the blazar 1ES 1959+650 observed with AstroSat/SXT",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:04Z",
  "url": "https://research.draconitic.com/paper/5dz1femetqbqx",
  "venue": "arXiv",
  "versions": []
}