<?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>S0185-11012021000200251</article-id>
<article-id pub-id-type="doi">10.22201/ia.01851101p.2021.57.02.01</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Study of blazar activity in 10 year Fermi-LAT data and implications for TeV neutrino expectations]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sacahui]]></surname>
<given-names><![CDATA[J. R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Penacchioni]]></surname>
<given-names><![CDATA[A. V.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marinelli]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sharma]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Osorio]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,USAC Instituto de Investigación en Ciencias Físicas y Matemáticas ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Guatemala</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Física de La Plata  ]]></institution>
<addr-line><![CDATA[La Plata ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nazionale di Fisica Nucleare  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Italy</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Uppsala University Dept. of Physics and Astronomy ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Sweden</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Nacional de Pesquisas Espaciais Divisão de Astrofísica ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Astronomía ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,Universidad Nacional de Cuyo Instituto Balseiro ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af8">
<institution><![CDATA[,University of La Plata Dept. of Physics ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af9">
<institution><![CDATA[,Universidade Estadual de Campinas Instituto de Computacão ]]></institution>
<addr-line><![CDATA[Campinas ]]></addr-line>
<country>Brazil</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>2</numero>
<fpage>251</fpage>
<lpage>268</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012021000200251&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012021000200251&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012021000200251&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Blazars are the most active extragalactic gamma-ray sources. They show sporadic bursts of activity, lasting from hours to months. In this work we present a 10-year analysis of a sample of bright sources detected by Fermi-LAT (100 MeV 300 GeV). Using 2-week binned light curves (LC) we estimate the duty cycle (DC): fraction of time that the source spends in an active state. The objects show different DC values, with an average of 22.74% and 23.08% when considering (or not) the extragalactic background light ( EBL). Additionally, we study the so-called &#8220;blazar sequence&#8221; trend for the sample of selected blazars in the ten years of data. This analysis constrains a possible counterpart of sub-PeV neutrino emission during the quiescent states, leaving open the possibility to explain the observed IceCube signal during the flaring states.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Los blazares son las fuentes de rayos gamma más activas. Presentan períodos esporádicos de actividad, con duraciones de horas a meses. En este trabajo presentamos un análisis de una muestra de fuentes brillantes detectadas por Fermi-LAT (100 MeV - 300 GeV) durante una década. Usando curvas de luz con episodios de 2 semanas estimamos el ciclo de actividad (DC): la fracción de tiempo que la fuente pasa en el estado activo. Los objetos presentan diferentes valores del DC, con promedios de 22.74% y 23.08% cuando se considera y no se considera el fondo de luz difusa. Adicionalmente, estudiamos la tendencia conocida como &#8220;secuencia de blazares&#8221;. Este análisis restringe una posible contraparte de neutrinos con energías de sub-PeV durante los estados estacionarios, dejando la posibilidad de explicar las observaciones de IceCube durante los períodos de fase activa.]]></p></abstract>
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