<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd">
  <responseDate>2026-04-10T20:29:54Z</responseDate>
  <request identifier="oai:pub.unibl.org:40791" metadataPrefix="mets" verb="GetRecord">https://pub.unibl.org/oai</request>
  <GetRecord>
    <record>
      <header>
        <identifier>oai:pub.unibl.org:40791</identifier>
        <datestamp>2024-06-12T14:23:57Z</datestamp>
      </header>
      <metadata>
        <mets xmlns="http://www.loc.gov/METS/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/METS/ http://www.loc.gov/standards/mets/mets.xsd" xmlns:xlink="http://www.w3.org/1999/xlink">
          <dmdSec ID="dmd-40791">
            <mdWrap MDTYPE="DC" MDTYPEVERSION="DCMI Metadata Terms">
              <xmlData xmlns:dcterms="http://purl.org/dc/terms/">
                <dcterms:title>First Long-term Optical Spectral Monitoring of a Binary Black Hole Candidate E1821+643. I. Variability of Spectral Lines and Continuum</dcterms:title>
                <dcterms:creator xsi:type="dcterms:URI" title="Alla I. Shapovalova">/unibl/author/Alla I. Shapovalova</dcterms:creator>
                <dcterms:creator xsi:type="dcterms:URI" title="Лука Поповић">/unibl/author/Luka Popović</dcterms:creator>
                <dcterms:creator xsi:type="dcterms:URI" title="Vahram Chavushyan">/unibl/author/Vahram Chavushyan</dcterms:creator>
                <dcterms:creator xsi:type="dcterms:URI" title="A. N. Burenkov">/unibl/author/A. N. Burenkov</dcterms:creator>
                <dcterms:creator xsi:type="dcterms:URI" title="Dragana Ilić">/unibl/author/Dragana Ilić</dcterms:creator>
                <dcterms:creator xsi:type="dcterms:URI" title="Wolfram Kollatschny">/unibl/author/Wolfram Kollatschny</dcterms:creator>
                <dcterms:creator xsi:type="dcterms:URI" title="Andjelka Kovačević">/unibl/author/Andjelka Kovačević</dcterms:creator>
                <dcterms:creator xsi:type="dcterms:URI" title="J.R. Valdes">/unibl/author/J.R. Valdes</dcterms:creator>
                <dcterms:creator xsi:type="dcterms:URI" title="V. Patino-Alvarez">/unibl/author/V. Patino-Alvarez</dcterms:creator>
                <dcterms:creator xsi:type="dcterms:URI" title="J. Leon-Tavares">/unibl/author/J. Leon-Tavares</dcterms:creator>
                <dcterms:creator xsi:type="dcterms:URI" title="J. Torrealba">/unibl/author/J. Torrealba</dcterms:creator>
                <dcterms:creator xsi:type="dcterms:URI" title="V.E. Zhdanova">/unibl/author/V.E. Zhdanova</dcterms:creator>
                <dcterms:date>2016-02</dcterms:date>
                <dcterms:type>Academic Article</dcterms:type>
                <dcterms:type>text</dcterms:type>
                <dcterms:format>18</dcterms:format>
                <dcterms:format>1</dcterms:format>
                <dcterms:identifier>/unibl/sci/idNaucniRad:18598</dcterms:identifier>
                <dcterms:identifier xsi:type="dcterms:URI" title="info:doi/10.3847/0067-0049/222/2/25">https://dx.doi.org/10.3847/0067-0049/222/2/25</dcterms:identifier>
                <dcterms:relation>ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES</dcterms:relation>
                <dcterms:relation>0067-0049</dcterms:relation>
                <dcterms:isPartOf>ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES</dcterms:isPartOf>
                <dcterms:isPartOf>0067-0049</dcterms:isPartOf>
                <dcterms:references xsi:type="dcterms:URI">http://iopscience.iop.org/article/10.3847/0067-0049/222/2/25/meta</dcterms:references>
                <dcterms:bibliographicCitation>A. Shapovalova, L. Popović, V. Chavushyan, A. Burenkov, D. Ilić, W. Kollatschny, A. Kovačević, J. Valdes, V. Patino-Alvarez, J. Leon-Tavares, J. Torrealba, V. Zhdanova, First Long-term Optical Spectral Monitoring of a Binary Black Hole Candidate E1821+643. I. Variability of Spectral Lines and Continuum, ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, Vol. 222, No. 2, pp. 1 - 18, Feb, 2016</dcterms:bibliographicCitation>
              </xmlData>
            </mdWrap>
          </dmdSec>
          <structMap>
            <div DMDID="dmd-40791"/>
          </structMap>
        </mets>
      </metadata>
    </record>
  </GetRecord>
</OAI-PMH>