{
  "id": "2102.02466",
  "version": "v1",
  "published": "2021-02-04T07:50:46.000Z",
  "updated": "2021-02-04T07:50:46.000Z",
  "title": "High Frequency Radio Observations of Two Magnetars, PSR J1622$-$4950 and 1E 1547.0$-$5408",
  "authors": [
    "Che-Yen Chu",
    "C. -Y. Ng",
    "Albert K. H. Kong",
    "Hsiang-Kuang Chang"
  ],
  "comment": "7 pages, 4 figures, to be published in MNRAS",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "We investigated the radio spectra of two magnetars, PSR J1622$-$4950 and 1E 1547.0$-$5408, using observations from the Australia Telescope Compact Array and the Atacama Large Millimeter/submillimeter Array taken in 2017. Our observations of PSR J1622$-$4950 show a steep spectrum with a spectral index of $-$1.3 $\\pm$ 0.2 in the range of 5.5-45 GHz during its re-activating X-ray outburst in 2017. By comparing the data taken at different epochs, we found significant enhancement in the radio flux density. The spectrum of 1E 1547.0$-$5408 was inverted in the range of 43-95 GHz, suggesting a spectral peak at a few hundred gigahertz. Moreover, we obtained the X-ray and radio data of radio magnetars, PSR J1622$-$4950 and SGR J1745$-$2900, from literature and found two interesting properties. First, radio emission is known to be associated with X-ray outburst but has different evolution. We further found that the rising time of the radio emission is much longer than that of the X-ray during the outburst. Second, the radio magnetars may have double peak spectra at a few GHz and a few hundred GHz. This could indicate that the emission mechanism is different in the cm and the sub-mm bands. These two phenomenons could provide a hint to understand the origin of radio emission and its connection with the X-ray properties.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-02-04T07:50:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "high frequency radio observations",
      "psr j1622",
      "radio emission",
      "atacama large millimeter/submillimeter array taken",
      "australia telescope compact array"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}