<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0185-1101</journal-id>
<journal-title><![CDATA[Revista mexicana de astronomía y astrofísica]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. astron. astrofis]]></abbrev-journal-title>
<issn>0185-1101</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Astronomía]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-11012021000100067</article-id>
<article-id pub-id-type="doi">10.22201/ia.01851101p.2021.57.01.04</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Speckle Interferometry at the Observatorio Astronómico Nacional. VII]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Orlov]]></surname>
<given-names><![CDATA[V. G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Astronomía ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>57</volume>
<numero>1</numero>
<fpage>67</fpage>
<lpage>80</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012021000100067&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012021000100067&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012021000100067&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The results of speckle interferometric measurements of binary stars performed during June, 2016 with the 2.1 m telescope at the Observatorio Astronómico Nacional at SPM (México) are given. We report 480 astrometric measurements of 468 double stars systems. The measured angular separations p range from 000.091 to 500.93. Most of the observed pairs (414 out of 468) are close double stars having separations of p &#8804; 1´´. We confirm as double stars 59 targets and we found 3 new pairs with separation of less than 100. Finally, we show that the high resolution autocorrelation function in polar coordinates allows to easily recover astrometric parameters even in the presence of strong telescope aberrations.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se presentan las mediciones de interferometría de motas de estrellas binarias, realizadas durante el mes de junio de 2016 con el telescopio de 2.1 m del Observatorio Astronómico Nacional en SPM (México). Reportamos 480 mediciones astrométricas de 468 sistemas de estrellas dobles. Las separaciones angulares medidas p van desde 000:091 a 500:93. La mayoría de los pares observados (414 de 468) son estrellas dobles cercanas con una separación p &#8804; 1´´. Confirmamos 59 objetos como estrellas dobles e identificamos 3 nuevos pares con una separación de menos de 100. Finalmente, mostramos que la función de autocorrelación de alta resolución en coordenadas polares permite recuperar fácilmente los parámetros astrométricos, incluso en presencia de fuertes aberraciones del telescopio.]]></p></abstract>
</article-meta>
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