1 Ocak 2016 Dergi makalesi Açık Erişim

Valtonen, M. J.; Zola, S.; Ciprini, S.; Gopakumar, A.; Matsumoto, K.; Sadakane, K.; Kidger, M.; Gazeas, K.; Nilsson, K.; Berdyugin, A.; Piirola, V.; Jermak, H.; Baliyan, K. S.; Alicavus, F.; Boyd, D.; Campas Torrent, M.; Campos, F.; Carrillo Gomez, J.; Caton, D. B.; Chavushyan, V.; Chavushyan, V.

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{
  "DOI": "10.3847/2041-8205/819/2/L37", 
  "abstract": "OJ 287 is a quasi-periodic quasar with roughly 12 year optical cycles. It displays prominent outbursts that are predictable in a binary black hole model. The model predicted a major optical outburst in 2015 December. We found that the outburst did occur within the expected time range, peaking on 2015 December 5 at magnitude 12.9 in the optical R-band. Based on Swift/XRT satellite measurements and optical polarization data, we find that it included a major thermal component. Its timing provides an accurate estimate for the spin of the primary black hole, chi = 0.313 +/- 0.01. The present outburst also confirms the established general relativistic properties of the system such as the loss of orbital energy to gravitational radiation at the 2% accuracy level, and it opens up the possibility of testing the black hole no-hair theorem with 10% accuracy during the present decade.", 
  "author": [
    {
      "family": "Valtonen", 
      "given": " M. J."
    }, 
    {
      "family": "Zola", 
      "given": " S."
    }, 
    {
      "family": "Ciprini", 
      "given": " S."
    }, 
    {
      "family": "Gopakumar", 
      "given": " A."
    }, 
    {
      "family": "Matsumoto", 
      "given": " K."
    }, 
    {
      "family": "Sadakane", 
      "given": " K."
    }, 
    {
      "family": "Kidger", 
      "given": " M."
    }, 
    {
      "family": "Gazeas", 
      "given": " K."
    }, 
    {
      "family": "Nilsson", 
      "given": " K."
    }, 
    {
      "family": "Berdyugin", 
      "given": " A."
    }, 
    {
      "family": "Piirola", 
      "given": " V."
    }, 
    {
      "family": "Jermak", 
      "given": " H."
    }, 
    {
      "family": "Baliyan", 
      "given": " K. S."
    }, 
    {
      "family": "Alicavus", 
      "given": " F."
    }, 
    {
      "family": "Boyd", 
      "given": " D."
    }, 
    {
      "family": "Campas Torrent", 
      "given": " M."
    }, 
    {
      "family": "Campos", 
      "given": " F."
    }, 
    {
      "family": "Carrillo Gomez", 
      "given": " J."
    }, 
    {
      "family": "Caton", 
      "given": " D. B."
    }, 
    {
      "family": "Chavushyan", 
      "given": " V."
    }, 
    {
      "family": "Chavushyan", 
      "given": " V."
    }
  ], 
  "container_title": "ASTROPHYSICAL JOURNAL LETTERS", 
  "id": "59659", 
  "issue": "2", 
  "issued": {
    "date-parts": [
      [
        2016, 
        1, 
        1
      ]
    ]
  }, 
  "title": "PRIMARY BLACK HOLE SPIN IN OJ 287 AS DETERMINED BY THE GENERAL RELATIVITY CENTENARY FLARE", 
  "type": "article-journal", 
  "volume": "819"
}