1 Ocak 2023 Dergi makalesi Açık Erişim

Avdan, H.; Sonbas, E.; Dhuga, K. S.; Vinokurov, A.; Goegues, E.; Avdan, S.; Solovyeva, Y. N.; Kostenkov, A. E.; Shablovinskaya, E. S.; Goktas, D.

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{
  "@context": "https://schema.org/", 
  "@id": 269454, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "affiliation": "Adiyaman Univ, Dept Phys, TR-02040 Adiyaman, Turkiye", 
      "name": "Avdan, H."
    }, 
    {
      "@type": "Person", 
      "name": "Sonbas, E."
    }, 
    {
      "@type": "Person", 
      "affiliation": "George Washington Univ, Dept Phys, Washington, DC 20052 USA", 
      "name": "Dhuga, K. S."
    }, 
    {
      "@type": "Person", 
      "affiliation": "Special Astrophys Observ Russian AS, Nizhnii Arkhyz, Russia", 
      "name": "Vinokurov, A."
    }, 
    {
      "@type": "Person", 
      "affiliation": "Sabanci Univ, Fac Engn & Nat Sci, Istanbul, Turkiye", 
      "name": "Goegues, E."
    }, 
    {
      "@type": "Person", 
      "affiliation": "Adiyaman Univ, Dept Phys, TR-02040 Adiyaman, Turkiye", 
      "name": "Avdan, S."
    }, 
    {
      "@type": "Person", 
      "affiliation": "Special Astrophys Observ Russian AS, Nizhnii Arkhyz, Russia", 
      "name": "Solovyeva, Y. N."
    }, 
    {
      "@type": "Person", 
      "affiliation": "Special Astrophys Observ Russian AS, Nizhnii Arkhyz, Russia", 
      "name": "Kostenkov, A. E."
    }, 
    {
      "@type": "Person", 
      "affiliation": "Special Astrophys Observ Russian AS, Nizhnii Arkhyz, Russia", 
      "name": "Shablovinskaya, E. S."
    }, 
    {
      "@type": "Person", 
      "affiliation": "Adiyaman Univ, Dept Phys, TR-02040 Adiyaman, Turkiye", 
      "name": "Goktas, D."
    }
  ], 
  "datePublished": "2023-01-01", 
  "description": "<p>Archival XMM-Newton, Chandra, and Hubble Space Telescope(HST) data have been used to study the X-ray and optical properties of two candidate ultraluminous X-ray sources in NGC 4536. In order to search for potential optical counterparts, relative astrometry between Chandra and HST was improved, and as a result, optical counterparts were detected for both X-ray sources. To complement our findings (based on the archival data), ground-based optical spectra of the counterparts were obtained with the 6-m BTA (Big Telescope Alt-azimuth) Telescope located at the Special Astrophysical Observatory. The calculated redshift (z = 0.4391 +/- 0.0010) for one of the sources (X-3) indicates that the source is, in fact, a background active galactic nucleus. Two possible optical counterparts (s1 and s2) were found for X-2. Whether s1 is point-like or an extended source is unclear: If it is point-like and the emission is dominated by the donor, its spectral type indicates O-B star. The second source (s2) is point-like and is consistent with the colours and absolute magnitudes of a red supergiant.</p>", 
  "headline": "Optical counterparts of two candidate ultraluminous X-ray sources in NGC 4536", 
  "identifier": 269454, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Optical counterparts of two candidate ultraluminous X-ray sources in NGC 4536", 
  "url": "https://aperta.ulakbim.gov.tr/record/269454"
}