{
  "id": "2005.05305",
  "version": "v1",
  "published": "2020-05-09T12:57:11.000Z",
  "updated": "2020-05-09T12:57:11.000Z",
  "title": "Speckle interferometry at SOAR in 2019",
  "authors": [
    "Andrei Tokovinin",
    "Brian D. Mason",
    "Rene A. Mendez",
    "Edgardo Costa",
    "Elliott P. Horch"
  ],
  "comment": "Accepted by The Astronomical Journal. 10 pages, 5 Figures. Measurements and non-resolutions, published electronically, are available from the first author. arXiv admin note: substantial text overlap with arXiv:1905.10436",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2019 are given, totaling 2555 measurements of 1972 resolved pairs with separations from 15 mas (median 0.21\") and magnitude difference up to 6 mag, and non-resolutions of 684 targets. We resolved for the first time 90 new pairs or subsystems in known binaries. This work continues our long-term speckle program. Its main goal is to monitor orbital motion of close binaries, including members of high-order hierarchies and Hipparcos pairs in the solar neighborhood. We give a list of 127 orbits computed using our latest measurements. Their quality varies from excellent (25 orbits of grades 1 and 2) to provisional (47 orbits of grades 4 and 5).",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-05-09T12:57:11.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "speckle interferometry",
      "speckle interferometric observations",
      "long-term speckle program",
      "monitor orbital motion",
      "measurements"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}