<?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>S0185-11012024000200305</article-id>
<article-id pub-id-type="doi">10.22201/ia.01851101p.2024.60.02.08</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Relationship between photometric period and surface differential rotation in chromospherically active stars]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Özdarcan]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dal]]></surname>
<given-names><![CDATA[H. A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sipahi K&#305;l&#305;ç]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Yolda&#351;]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Ege University Faculty of Science Department of Astronomy and Space Sciences]]></institution>
<addr-line><![CDATA[Bornova Izmir]]></addr-line>
<country>Turkey</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>60</volume>
<numero>2</numero>
<fpage>305</fpage>
<lpage>316</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012024000200305&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012024000200305&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012024000200305&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract We present a quantitative investigation of the relationship between the photometric periods of late-type chromospherically active stars showing spot activity and their photometric period variation interval as the proxy of the surface di&#64256;erential rotation. The results show that as the photometric period increases, the magnitude of the surface di&#64256;erential rotation also increases. However, there is a noticeable distinction between main sequence and evolved stars. Comparing a main sequence star and an evolved star with the same photometric period, it turns out that the magnitude of the surface di&#64256;erential rotation of the main sequence star appears greater than that of the evolved star. The distinction is apparent around short photometric periods but tends to disappear towards longer photometric periods.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Presentamos una investigación cuantitativa de la relación entre los períodos fotométricos de estrellas tardías con actividad cromosférica y manchas y el intervalo de variación del período fotométrico, como indicador de la rotación diferencial superficial. Los resultados muestran que al aumentar el período fotométrico aumenta también la magnitud de la rotación diferencial superficial. Sin embargo, hay una diferencia notable entre estrellas de la secuencia principal y estrellas evolucionadas. Al comparar ambas, encontramos que la magnitud de la rotación diferencial superficial es mayor en las estrellas de la secuencia principal que en las evolucionadas, para períodos fotométricos iguales. Esta diferencia es notable para los períodos fotométricos cortos pero tiende a desaparecer hacia períodos mayores.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[stars: activity]]></kwd>
<kwd lng="en"><![CDATA[stars: late-type]]></kwd>
<kwd lng="en"><![CDATA[stars: rotation]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Amado]]></surname>
<given-names><![CDATA[P. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of chromospheric activity on the mean colours of late-type stars II. Is (B-V)0 also affected?]]></article-title>
<source><![CDATA[A&amp;A]]></source>
<year>2003</year>
<volume>404</volume>
<page-range>631</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Baliunas]]></surname>
<given-names><![CDATA[S. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Donahue]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Soon]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Henry]]></surname>
<given-names><![CDATA[G. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Donahue]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Bookbinder]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Tenth Cambridge Workshop on Cool Stars, Stellar Systems and the Sun]]></source>
<year>1998</year>
<volume>154</volume>
<page-range>153</page-range><publisher-name><![CDATA[ASPC]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Baliunas]]></surname>
<given-names><![CDATA[S. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Donahue]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Soon]]></surname>
<given-names><![CDATA[W. H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chromospheric Variations in Main-Sequence Stars. II]]></article-title>
<source><![CDATA[ApJ]]></source>
<year>1995</year>
<volume>438</volume>
<page-range>269</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Berdnikov]]></surname>
<given-names><![CDATA[L. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Pastukhova]]></surname>
<given-names><![CDATA[E. N.]]></given-names>
</name>
</person-group>
<source><![CDATA[PZ]]></source>
<year>2008</year>
<volume>28</volume>
<page-range>9</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bernhard]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Bernhard]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Bernhard]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[OEJV]]></source>
<year>2009</year>
<volume>98</volume>
<page-range>1</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bernhard]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Lloyd]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[OEJV]]></source>
<year>2008</year>
<volume>92</volume>
<page-range>1</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bernhard]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Lloyd]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[OEJV]]></source>
<year>2008</year>
<volume>82</volume>
<page-range>1</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bernhard]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Lloyd]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Frank]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[OEJV]]></source>
<year>2010</year>
<volume>123</volume>
<page-range>1</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bernhard]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Otero]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[PZP]]></source>
<year>2011</year>
<volume>11</volume>
<page-range>15</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bressan]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Marigo]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Girardi]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[PARSEC: stellar tracks and isochrones with the PAdova and TRieste Stellar Evolution Code]]></article-title>
<source><![CDATA[MNRAS]]></source>
<year>2012</year>
<volume>427</volume>
<page-range>127</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Donahue]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Saar]]></surname>
<given-names><![CDATA[S. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Baliunas]]></surname>
<given-names><![CDATA[S. L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A Relationship between Mean Rotation Period in Lower Main-Sequence Stars and Its Observed Range]]></article-title>
<source><![CDATA[ApJ]]></source>
<year>1996</year>
<volume>466</volume>
<page-range>384</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Drilling]]></surname>
<given-names><![CDATA[J. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Landolt]]></surname>
<given-names><![CDATA[A. U.]]></given-names>
</name>
<name>
<surname><![CDATA[Cox]]></surname>
<given-names><![CDATA[A. N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Allen&#8217;s Astrophysical Quantities]]></source>
<year>2000</year>
<page-range>381</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Duncan]]></surname>
<given-names><![CDATA[D. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Vaughan]]></surname>
<given-names><![CDATA[A. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Wilson]]></surname>
<given-names><![CDATA[O. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[CA II H and K Measurements Made at Mount Wilson Observatory, 1966-1983]]></article-title>
<source><![CDATA[ApJS]]></source>
<year>1991</year>
<volume>76</volume>
<page-range>383</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fekel]]></surname>
<given-names><![CDATA[F. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Henry]]></surname>
<given-names><![CDATA[G. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Eaton]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Sperauskas]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Hall]]></surname>
<given-names><![CDATA[D. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chromospherically Active Stars. XXI. The Giant, Single-lined Binaries HD 89546 And HD 113816]]></article-title>
<source><![CDATA[AJ]]></source>
<year>2002</year>
<volume>124</volume>
<page-range>1064</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Prusti]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[de Bruijne]]></surname>
<given-names><![CDATA[J. H. J.]]></given-names>
</name>
</person-group>
<collab>Gaia Collaboration</collab>
<article-title xml:lang=""><![CDATA[The Gaia mission]]></article-title>
<source><![CDATA[A&amp;A]]></source>
<year>2016</year>
<volume>595</volume>
<page-range>1</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vallenari]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Brown]]></surname>
<given-names><![CDATA[A. G. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Gaia Data Release 3. Summary of the content and survey properties]]></article-title>
<source><![CDATA[A&amp;A]]></source>
<year>2023</year>
<volume>674</volume>
<page-range>1</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gray]]></surname>
<given-names><![CDATA[D. F.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Observation and Analysis of Stellar Photospheres]]></source>
<year>2005</year>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hardie]]></surname>
<given-names><![CDATA[R. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Hiltner]]></surname>
<given-names><![CDATA[W. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Astronomical techniques]]></source>
<year>1964</year>
<page-range>178</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Henden]]></surname>
<given-names><![CDATA[A. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Levine]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Terrell]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Welch]]></surname>
<given-names><![CDATA[D. L.]]></given-names>
</name>
</person-group>
<source><![CDATA[AAS]]></source>
<year>2015</year>
<volume>225</volume>
<page-range>336.16</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Høg]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Fabricius]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Makarov]]></surname>
<given-names><![CDATA[V. V.]]></given-names>
</name>
</person-group>
<source><![CDATA[A&amp;A]]></source>
<year>2000</year>
<volume>355</volume>
<page-range>27</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kitchatinov]]></surname>
<given-names><![CDATA[L. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Rüdiger]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[A&amp;A]]></source>
<year>1999</year>
<volume>344</volume>
<page-range>911</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kochanek]]></surname>
<given-names><![CDATA[C. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Shappee]]></surname>
<given-names><![CDATA[B. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Stanek]]></surname>
<given-names><![CDATA[K. Z.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0]]></article-title>
<source><![CDATA[PASP]]></source>
<year>2017</year>
<volume>129</volume>
<page-range>4502</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[K&#337;vári]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Oláh]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Kriskovics]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Rotation-differential rotation relationships for late-type single and binary stars from Doppler imaging]]></article-title>
<source><![CDATA[AN]]></source>
<year>2017</year>
<volume>338</volume>
<page-range>903</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Landolt]]></surname>
<given-names><![CDATA[A. U.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[UBVRI PHOTOMETRIC STANDARD STARS AROUND THE CELESTIAL EQUATOR: UPDATES AND ADDITIONS]]></article-title>
<source><![CDATA[AJ]]></source>
<year>2009</year>
<volume>137</volume>
<page-range>4186</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Landolt]]></surname>
<given-names><![CDATA[A. U.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[UBVRI PHOTOMETRIC STANDARD STARS AROUND THE SKY AT +50 deg DECLINATION]]></article-title>
<source><![CDATA[AJ]]></source>
<year>2013</year>
<volume>146</volume>
<page-range>131</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Messina]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Guinan]]></surname>
<given-names><![CDATA[E. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Magnetic activity of six young solar analogues II. Surface Differential Rotation from long-term photometry]]></article-title>
<source><![CDATA[A&amp;A]]></source>
<year>2003</year>
<volume>409</volume>
<page-range>1017</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mishra]]></surname>
<given-names><![CDATA[D. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Routh]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Jha]]></surname>
<given-names><![CDATA[B. K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Differential Rotation of the Solar Chromosphere: A Century-long Perspective from Kodaikanal Solar Observatory Ca ii K Data]]></article-title>
<source><![CDATA[ApJ]]></source>
<year>2024</year>
<volume>961</volume>
<page-range>40</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Özdarcan]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spectroscopic and photometric analysis of 21 chromospherically active variables: Activity cycles and differential rotation]]></article-title>
<source><![CDATA[PASA]]></source>
<year>2021</year>
<volume>38</volume>
<page-range>27</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Özdarcan]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Dal]]></surname>
<given-names><![CDATA[H. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spectroscopic and photometric confirmation of chromospheric activity in four stars]]></article-title>
<source><![CDATA[AN]]></source>
<year>2018</year>
<volume>339</volume>
<page-range>277</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Özdarcan]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Evren]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Henry]]></surname>
<given-names><![CDATA[G. W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spot activity on HD 89546 (FG UMa) from long-term photometry]]></article-title>
<source><![CDATA[AN]]></source>
<year>2012</year>
<volume>333</volume>
<page-range>138</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Özdarcan]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Evren]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Strassmeier]]></surname>
<given-names><![CDATA[K. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Granzer]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Henry]]></surname>
<given-names><![CDATA[G. W.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Discovery of cyclic spot activity on the G8 giant HD 208472]]></article-title>
<source><![CDATA[AN]]></source>
<year>2010</year>
<volume>331</volume>
<page-range>794</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pojmanski]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The All Sky Automated Survey]]></article-title>
<source><![CDATA[AcA]]></source>
<year>1997</year>
<volume>47</volume>
<page-range>467</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pojmanski]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The All Sky Automated Survey. Variable Stars in the 0h - 6h Quarter of the Southern Hemisphere]]></article-title>
<source><![CDATA[AcA]]></source>
<year>2002</year>
<volume>52</volume>
<page-range>397</page-range></nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pojmanski]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Pilecki]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Szczygiel]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The All Sky Automated Survey. The Catalog of Variable Stars. V. Declinations 0 deg - 28 deg of the Northern Hemisphere]]></article-title>
<source><![CDATA[AcA]]></source>
<year>2005</year>
<volume>55</volume>
<page-range>275</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reinhold]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Gizon]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Rotation, differential rotation, and gyrochronology of active Kepler stars]]></article-title>
<source><![CDATA[A&amp;A]]></source>
<year>2015</year>
<volume>583</volume>
<page-range>65</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ricker]]></surname>
<given-names><![CDATA[G. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Winn]]></surname>
<given-names><![CDATA[J. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Vanderspek]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Transiting Exoplanet Survey Satellite]]></article-title>
<source><![CDATA[JATIS]]></source>
<year>2014</year>
<volume>1</volume>
<page-range>014003</page-range></nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schirmer]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bernhard]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Lloyd]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[OEJV]]></source>
<year>2009</year>
<volume>105</volume>
<page-range>1</page-range></nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schlafly]]></surname>
<given-names><![CDATA[E. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Finkbeiner]]></surname>
<given-names><![CDATA[D. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[MEASURING REDDENING WITH SLOAN DIGITAL SKY SURVEY STELLAR SPECTRA AND RECALIBRATING SFD]]></article-title>
<source><![CDATA[ApJ]]></source>
<year>2011</year>
<volume>737</volume>
<page-range>103</page-range></nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schwarzenberg-Czerny]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Accuracy of period determination]]></article-title>
<source><![CDATA[MNRAS]]></source>
<year>1991</year>
<volume>253</volume>
<page-range>198</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schwarzenberg-Czerny]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fast and Statistically Optimal Period Search in Uneven Sampled Observations]]></article-title>
<source><![CDATA[ApJ]]></source>
<year>1996</year>
<volume>460</volume>
<page-range>107</page-range></nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shappee]]></surname>
<given-names><![CDATA[B. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Prieto]]></surname>
<given-names><![CDATA[J. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Grupe]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[THE MAN BEHIND THE CURTAIN: X-RAYS DRIVE THE UV THROUGH NIR VARIABILITY IN THE 2013 ACTIVE GALACTIC NUCLEUS OUTBURST IN NGC 2617]]></article-title>
<source><![CDATA[ApJ]]></source>
<year>2014</year>
<volume>788</volume>
<page-range>48</page-range></nlm-citation>
</ref>
<ref id="B42">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Torres]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Neuhäuser]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Guenther]]></surname>
<given-names><![CDATA[E. W.]]></given-names>
</name>
</person-group>
<source><![CDATA[AJ]]></source>
<year>2002</year>
<volume>123</volume>
<page-range>1701</page-range></nlm-citation>
</ref>
<ref id="B43">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vaughan]]></surname>
<given-names><![CDATA[A. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Preston]]></surname>
<given-names><![CDATA[G. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Wilson]]></surname>
<given-names><![CDATA[O. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[FLUX MEASUREMENTS OF CA II AND K EMISSION]]></article-title>
<source><![CDATA[PASP]]></source>
<year>1978</year>
<volume>90</volume>
<page-range>267</page-range></nlm-citation>
</ref>
<ref id="B44">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wilson]]></surname>
<given-names><![CDATA[O. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chromospheric variations in main-sequence stars]]></article-title>
<source><![CDATA[ApJ]]></source>
<year>1978</year>
<volume>226</volume>
<page-range>379</page-range></nlm-citation>
</ref>
<ref id="B45">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[J.-C.]]></given-names>
</name>
<name>
<surname><![CDATA[Gao]]></surname>
<given-names><![CDATA[P.-X.]]></given-names>
</name>
<name>
<surname><![CDATA[Shi]]></surname>
<given-names><![CDATA[X.-J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[On the Rotation of the Solar Chromosphere]]></article-title>
<source><![CDATA[ApJ]]></source>
<year>2020</year>
<volume>902</volume>
<page-range>64</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
