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<ri:Resource created="2010-07-12T07:46:11Z" 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>Late B-type stars classification</title><shortName>J/AJ/107/1556</shortName><identifier>ivo://CDS.VizieR/J/AJ/107/1556</identifier><altIdentifier>doi:10.26093/cds/vizier.51071556</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Garrison R.F.</name></creator><creator><name>Gray R.O.</name></creator><date role="Updated">2023-04-06T16:50:06Z</date><date role="Created">2010-07-12T07:46:11Z</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>morgan-keenan-classification</subject><subject>b-stars</subject><subject>visible-astronomy</subject><subject>medium-band-photometry</subject><description>In the fourth and final of a series of papers on the late B to the early F type stars, we refine the MK spectral classification system for the late B type stars and consider the effect of rotation on both spectral classification and Stromgren photometry of these stars. We extend the work of Morgan by establishing self-consistent sequences of narrow and broadlined standards. 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