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<ri:Resource created="2015-05-28T15:14:43Z" status="active" updated="2026-03-17T20:08:25Z" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/ConeSearch/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/ConeSearch.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>Long-Term Multicolour Photometry of YSOs</title><shortName>J/other/PASA/32.</shortName><identifier>ivo://CDS.VizieR/J/other/PASA/32.21</identifier><altIdentifier>doi:10.26093/cds/vizier/ds/dckcb</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Ibryamov S.</name></creator><creator><name>Semkov E.</name></creator><creator><name>Peneva S.</name></creator><date role="Updated">2026-03-17T20:08:25Z</date><date role="Created">2015-05-28T15:14:43Z</date><contact><name>CDS support team</name><address>CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France</address><email>cds-question@unistra.fr</email></contact></curation><content><subject>variable-stars</subject><subject>pre-main-sequence-stars</subject><subject>young-stellar-objects</subject><subject>infrared-photometry</subject><subject>visible-astronomy</subject><subject>broad-band-photometry</subject><description>Results from long-term multicolour optical photometric observations of the pre-main sequence stars FHO 26, FHO 27, FHO 28, FHO 29, and V1929 Cyg collected during the period from 1997 June to 2014 December are presented. The objects are located in the dense molecular cloud L935, named 'Gulf of Mexico', in the field between the North America and Pelican nebulae. All stars from our study exhibit strong photometric variability in all optical passbands. Using our BVRI observations and data published by other authors, we tried to define the reasons for the observed brightness variations. The presented paper is a part of our long-term photometric study of the young stellar objects in the region of 'Gulf of Mexico'.</description><source format="bibcode">2015PASA...32...21I</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/PASA/32.21</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic service</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>Conesearch service</relatedResource></relationship><relationship><relationshipType>related-to</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/J/other/BAJ/22.3">J/other/BAJ/22.3 : BVRI photometry of 5 PMS stars (Ibryamov+, 2015)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/A+A/568/A49">J/A+A/568/A49 : PMS sequence stars long term phot.</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/other/RAA/14.1264">J/other/RAA/14.1264 : V350 Cep UBVRI long-term photometry (Ibryamov+, 2014)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/other/PASA/32.11">J/other/PASA/32.11 : Long-term UBVRI photometry of GM Cephei (Semkov+, 2015)</relatedResource></relationship></content><rights>https://cds.unistra.fr/vizier-org/licences_vizier.html</rights><capability><interface xsi:type="vr:WebBrowser"><accessURL use="full">https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/PASA/32.21</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/PASA/32.21</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/PASA/32.21</mirrorURL></interface></capability><capability><interface xsi:type="vs:ParamHTTP"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/PASA/32.21</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/votable?-source=J/other/PASA/32.21</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/PASA/32.21</mirrorURL><queryType>GET</queryType><resultType>text/xml+votable</resultType></interface></capability><capability standardID="ivo://ivoa.net/std/TAP#aux"><interface xsi:type="vs:ParamHTTP" role="std"><accessURL use="base">https://tapvizier.cds.unistra.fr/TAPVizieR/tap</accessURL></interface></capability><capability xsi:type="cs:ConeSearch" standardID="ivo://ivoa.net/std/ConeSearch"><description>Cone search capability for table J/other/PASA/32.21/stars (List of studied stars)</description><interface xsi:type="vs:ParamHTTP" role="std"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/conesearch/J/other/PASA/32.21/stars?</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/conesearch/J/other/PASA/32.21/stars?</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/conesearch/J/other/PASA/32.21/stars?</mirrorURL><queryType>GET</queryType><resultType>text/xml+votable</resultType></interface><maxSR>180.0</maxSR><maxRecords>50000</maxRecords><verbosity>true</verbosity><testQuery><ra>314.24725</ra><dec>43.7980556</dec><sr>0.005555555555555556</sr></testQuery></capability><coverage><spatial>6/15362-15363</spatial><spectral>2.367228618189496e-19 4.920466254354166e-19</spectral><footprint ivo-id="ivo://ivoa.net/std/moc">https://cdsarc.cds.unistra.fr/viz-bin/moc/J/other/PASA/32.21?format=ascii</footprint><waveband>Optical</waveband><waveband>Infrared</waveband></coverage><tableset><schema><name>default</name><table><name>J/other/PASA/32.21/stars</name><description>List of studied stars</description><column><name>recno</name><description>Record number assigned by the VizieR team. 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