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<ri:Resource created="1999-05-09T21:46:10Z" status="active" updated="2025-06-13T15:25:00Z" 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>UBVRI CCD sequences for wide-field surveys. I.</title><shortName>J/MNRAS/276/33</shortName><identifier>ivo://CDS.VizieR/J/MNRAS/276/33</identifier><altIdentifier>doi:10.26093/cds/vizier.72760033</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Boyle B.J.</name></creator><creator><name>Shanks T.</name></creator><creator><name>Croom S.M.</name></creator><date role="Updated">2024-06-25T20:17:26Z</date><date role="Created">1999-05-09T21:46:10Z</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>infrared-photometry</subject><subject>visible-astronomy</subject><subject>broad-band-photometry</subject><subject>surveys</subject><description>We present the first results of a campaign to secure deep UBVRI CCD photometric calibration in all UK Schmidt equatorial fields with galactic latitudes |b|&lt;~50{deg}. In this paper we provide information on deep BVRI sequences (B&lt;22mag) in 14 UK Schmidt survey fields centred at declination=0{deg}. Deep U sequences have been obtained for 11 of these fields.</description><source format="bibcode">1995MNRAS.276...33B</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/276/33</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/MNRAS/306/592">J/MNRAS/306/592 : UBVR CCD sequences for wide-field surveys. II. 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