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<ri:Resource created="2010-12-13T12:00:00Z" status="active" updated="2026-03-04T11:08:16Z" version="1.2" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/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/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>SHASSA SM - Continuum subtract. survey collection</title><shortName>SHASSA SM</shortName><identifier>ivo://CDS/P/SHASSA/SM</identifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>CDS</name></creator><date role="Created">2010-12-13T12:00:00Z</date><date role="Updated">2019-05-05T07:18:00Z</date><contact><name>CDS Helpdesk</name><email>cds-question@unistra.fr</email></contact></curation><content><subject>Sky survey</subject><subject>Optical astronomy</subject><subject>Narrow band photometry</subject><subject>H alpha photometry</subject><description>The Southern H-Alpha Sky Survey Atlas is the product of a wide-angle digital imaging survey of the H-alpha emission from the warm ionized interstellar gas of our Galaxy. This atlas covers the southern hemisphere sky (declinations less than +15 degrees). The observations were taken with a robotic camera operating at Cerro Tololo Inter-American Observatory (CTIO) in Chile.Original acknowledgement for data: the Southern H-Alpha Sky Survey Atlas (SHASSA), which is supported by the National Science Foundation</description><source format="bibcode">2001PASP..113.1326G</source><referenceURL>https://alasky.cds.unistra.fr/SHASSA-SM</referenceURL><type>Survey</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsDerivedFrom</relationshipType><relatedResource>SHASSA</relatedResource></relationship></content><rights rightsURI="https://cds.unistra.fr/aladin-org/licences_aladin.html">This HiPS is distributed under ODbL license by Unistra/CNRS</rights><capability standardID="ivo://ivoa.net/std/hips#hips-1.0"><interface role="std" xsi:type="vs:ParamHTTP"><accessURL use="base">https://alasky.cds.unistra.fr/SHASSA-SM</accessURL><mirrorURL>https://alaskybis.cds.unistra.fr/SHASSA-SM</mirrorURL></interface></capability><coverage><temporal>50753 51847</temporal><spectral>3.028118684678245e-19 3.028118684678245e-19</spectral><footprint ivo-id="ivo://mocivod">https://alasky.cds.unistra.fr/SHASSA-SM/Moc.fits</footprint><waveband>Optical</waveband></coverage></ri:Resource>