<?xml version='1.0'?><?xml-stylesheet href='/static/xsl/oai.xsl' type='text/xsl'?><ri:Resource created="2026-01-11T16:12:00Z" status="active" updated="2026-06-16T15:11:35Z" version="1.2" xmlns:g-colstat="http://dc.g-vo.org/ColStats-1" 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://dc.g-vo.org/ColStats-1 http://vo.ari.uni-heidelberg.de/docs/schemata/Colstats.xsd http://www.ivoa.net/xml/RegistryInterface/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/RegistryInterface.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:CatalogResource"><title>Classical Cepheids</title><shortName>ogle.cepheids</shortName><identifier>ivo://astro.upjs/ogle/o/cepheids</identifier><curation><publisher>UPJŠ DC Team</publisher><creator><name>Soszyński, I.</name></creator><creator><name>Udalski, A.</name></creator><creator><name>Szymański, M.K.</name></creator><creator><name>Pietrukowicz, P.</name></creator><creator><name>Skowron, D.M.</name></creator><creator><name>Skowron, J.</name></creator><creator><name>Poleski, R.</name></creator><creator><name>Mróz, P.</name></creator><creator><name>Kozłowski, S.</name></creator><creator><name>Ulaczyk, K.</name></creator><creator><name>Iwanek, P.</name></creator><creator><name>Gromadzki, M.</name></creator><creator><name>Rybicki, K.</name></creator><creator><name>Wrona, M.</name></creator><creator><name>Ratajczak, M.</name></creator><creator><name>Mróz, M.</name></creator><creator><name>Borowicz, J.</name></creator><creator><name>Głowacki, M.</name></creator><creator><name>Urbanowicz, M.</name></creator><date role="Updated">2026-06-16T15:13:14Z</date><contact><name>UPJŠ Archive</name><address>Jesenná 5, 040 01 Košice, Slovakia</address><email>olga.vozyakova@student.upjs.sk</email></contact></curation><content><subject>light-curves</subject><subject>variable-stars</subject><subject>surveys</subject><description> Coordinates and variability parameters of all Classical Cepheids from
the OGLE Variable Star Collection. The table was constructed by
merging all Cepheid-related data from all OGLE fields, such as BLG,
GD, LMC, and SMC.</description><source format="bibcode">2017AcA....67..297S</source><referenceURL>https://skvo.science.upjs.sk/tableinfo/ogle.cepheids</referenceURL><type>Survey</type><contentLevel>Research</contentLevel></content><facility>Las Campanas</facility><instrument>Warsaw 1.3m Telescope</instrument><coverage><waveband>Optical</waveband></coverage><tableset><schema><name>ogle</name><title>OGLE Variable Star Parameters</title><description>
The **Optical Gravitational Lensing Experiment (OGLE)** is a long-term photometric 
survey operated by the University of Warsaw at Las Campanas Observatory.
Most of the observations are carried out in the Cousins *I* filter, with
auxiliary measurements in the *V* filter.

High-cadence, long-term observations of crowded fields have led to the
systematic discovery and classification of variable stars.
The OGLE Collection of Variable Stars (OCVS) contains over one million objects.
OCVS light curves span three survey phases: OGLE-II (1996-2000), OGLE-III
(2001-2009), and OGLE-IV (2010-present).

The VO-compliant re-publication of the OCVS light curve collection allows
bulk download for objects with a specific variability class and parameters,
which can be very handy for ML-based light curve analysis and related applications.

The original data of the republished collection can be found at: 
https://www.astrouw.edu.pl/ogle/ogle4/OCVS/

While republishing, we almost preserve the original data structure. That is, there are tables
with variable star parameters split by variability type (Cepheids, Eclipsing and Ellipsoidal
Binaries, RR Lyrae stars, etc.) and by sky field: Galactic Bulge (BLG), Magellanic Clouds
(LMC, SMC), Galactic Disc (GD). A few tables are related only to a variability class 
(e.g., Cataclysmic Variables - CV, BLAPs, Anomalous Cepheids in the Milky Way - ACEP/GAL)
or a specific field (M54 variables, which comprise diverse classes).

All observed objects with their main parameters are aggregated in the object_all table,
which facilitates generic queries across all classes. This table is served by Cone Search.

The ts_ssa table is the main table for light-curve queries. It is served by TAP and SSA services.
The time series themselves, as well as previews of folded and unfolded light curves, can be accessed
via DataLink from the ts_ssa and ObsCore tables. Direct links to previews of folded curves are placed
in the *preview* column of both the *ts_ssa* and *ObsCore* tables.</description><table><name>ogle.cepheids</name><title>Classical Cepheids</title><description> Coordinates and variability parameters of all Classical Cepheids from
the OGLE Variable Star Collection. The table was constructed by
merging all Cepheid-related data from all OGLE fields, such as BLG,
GD, LMC, and SMC.</description><nrows>11689</nrows><column><name>object_id</name><description>Star identifier</description><ucd>meta.id;meta.main</ucd><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>indexed</flag></column><column g-colstat:fillFactor="1" g-colstat:max-value="360" g-colstat:median="75.5851" g-colstat:min-value="0.254875" g-colstat:percentile03="9.72397" g-colstat:percentile97="275.436"><name>raj2000</name><description>Right ascension</description><unit>deg</unit><ucd>pos.eq.ra;meta.main</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column g-colstat:fillFactor="1" g-colstat:max-value="23.8829" g-colstat:median="-70.378" g-colstat:min-value="-79.1817" g-colstat:percentile03="-74.0353" g-colstat:percentile97="-3.43929"><name>dej2000</name><description>Declination</description><unit>deg</unit><ucd>pos.eq.dec;meta.main</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>ogle4_id</name><description>OGLE-IV Identifier</description><ucd>meta.id</ucd><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>ogle3_id</name><description>OGLE-III Identifier</description><ucd>meta.id</ucd><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>ogle2_id</name><description>OGLE-II Identifier</description><ucd>meta.id</ucd><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>vsx</name><description>VSX/GCVS/Macho or other designation</description><ucd>meta.id</ucd><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>ogle_vartype</name><description>OGLE type of variable star</description><ucd>meta.code.class</ucd><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>ssa_targclass</name><description>Object class (star, QSO,...; use Simbad object classification http://simbad.u-strasbg.fr/simbad/sim-display?data=otypes if at all possible)</description><ucd>src.class</ucd><utype>ssa:Target.Class</utype><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>ssa_collection</name><description>A short handle naming the collection this spectrum belongs to.</description><utype>ssa:DataID.Collection</utype><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>indexed</flag><flag>nullable</flag></column><column><name>ssa_reference</name><description>URL or bibcode of a publication describing this data.</description><ucd>meta.bib.bibcode</ucd><utype>ssa:Curation.Reference</utype><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column><name>pulse_mode</name><description>Cepheid Mode(s) of pulsation: F-fundamental, o1-first \ overtone, o2-second, etc</description><ucd>meta.code.class</ucd><dataType arraysize="*" xsi:type="vs:VOTableType">char</dataType><flag>nullable</flag></column><column g-colstat:fillFactor="0.996492" g-colstat:max-value="19.834" g-colstat:median="15.689" g-colstat:min-value="10.234" g-colstat:percentile03="12.3654" g-colstat:percentile97="17.64"><name>mean_i</name><description>Intensity mean I-band magnitude</description><unit>mag</unit><ucd>phot.mag</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column g-colstat:fillFactor="0.90367" g-colstat:max-value="21.843" g-colstat:median="16.5" g-colstat:min-value="11.314" g-colstat:percentile03="14.0514" g-colstat:percentile97="18.7351"><name>mean_v</name><description>Intensity mean V-band magnitude</description><unit>mag</unit><ucd>phot.mag</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column g-colstat:fillFactor="0.996492" g-colstat:max-value="1.383" g-colstat:median="0.342" g-colstat:min-value="0.005" g-colstat:percentile03="0.088" g-colstat:percentile97="0.758"><name>ampl_i</name><description>I-band amplitude of the primary period</description><unit>mag</unit><ucd>phot.mag</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column g-colstat:fillFactor="1" g-colstat:max-value="208.799" g-colstat:median="2.25285" g-colstat:min-value="0.223925" g-colstat:percentile03="0.516879" g-colstat:percentile97="14.0292"><name>period</name><description>Period (longest)</description><unit>d</unit><ucd>src.var;time.period</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column g-colstat:fillFactor="1" g-colstat:max-value="0.531718" g-colstat:median="5.2e-06" g-colstat:min-value="2e-07" g-colstat:percentile03="8e-07" g-colstat:percentile97="0.000419432"><name>period_err</name><description>Uncertainty of period</description><unit>d</unit><ucd>src.var;time.period</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column g-colstat:fillFactor="0.99692" g-colstat:max-value="60042.7" g-colstat:median="56000.7" g-colstat:min-value="55999.5" g-colstat:percentile03="55999.6" g-colstat:percentile97="60003.8"><name>epoch</name><description>Time of maximum brightness; mjd (HJD)</description><unit>d</unit><ucd>src.var;time.epoch</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column g-colstat:fillFactor="0.0831551" g-colstat:max-value="6.9622" g-colstat:median="0.617715" g-colstat:min-value="0.152173" g-colstat:percentile03="0.203186" g-colstat:percentile97="2.7384"><name>period_short</name><description>The shortest period of the Cepheid</description><unit>d</unit><ucd>src.var;time.period</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column g-colstat:fillFactor="0.0831551" g-colstat:max-value="0.0003437" g-colstat:median="5e-06" g-colstat:min-value="0" g-colstat:percentile03="5e-07" g-colstat:percentile97="4.1335e-05"><name>period_short_err</name><description>Uncertainty of the shortest period</description><unit>d</unit><ucd>src.var;time.period</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column g-colstat:fillFactor="0.00162546" g-colstat:max-value="0.962655" g-colstat:median="0.376204" g-colstat:min-value="0.182984" g-colstat:percentile03="0.184944" g-colstat:percentile97="0.871474"><name>period_med</name><description>The medium period of the Cepheid</description><unit>d</unit><ucd>src.var;time.period</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column g-colstat:fillFactor="0.00162546" g-colstat:max-value="1.03e-05" g-colstat:median="1.5e-06" g-colstat:min-value="2e-07" g-colstat:percentile03="2.54e-07" g-colstat:percentile97="1.0138e-05"><name>period_med_err</name><description>Uncertainty of the medium period</description><unit>d</unit><ucd>src.var;time.period</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column></table></schema></tableset></ri:Resource>