{"dcterms:modified":"2024-01-25","dcterms:creator":"Repositorio de datos de investigación de la Universidad de Chile","@type":"ore:ResourceMap","@id":"http://datos.uchile.cl/api/datasets/export?exporter=OAI_ORE&persistentId=https://doi.org/10.34691/FK2/9SGXZG","ore:describes":{"astrophysics:astroType":"Table","title":"Replicar los datos para: The high cadence transient survey (Hits): Source, light-curve and classification catalogs","author":[{"citation:authorName":"Martínez Palomera, Jorge","citation:authorAffiliation":"Universidad de Chile","authorIdentifierScheme":"ORCID","authorIdentifier":"https://orcid.org/0000-0002-7395-4935"},{"citation:authorName":"Förster, Francisco","citation:authorAffiliation":"Universidad de Chile","authorIdentifierScheme":"ORCID","authorIdentifier":"https://orcid.org/0000-0003-3459-2270"}],"citation:datasetContact":{"citation:datasetContactName":"Martínez Palomera, Jorge","citation:datasetContactAffiliation":"Universidad de Chile","citation:datasetContactEmail":"ccalabrano@uchile.cl"},"citation:dsDescription":{"citation:dsDescriptionValue":"The High Cadence Transient Survey (HiTS) aims to discover and study transient objects with characteristic timescales between hours and days, such as pulsating, eclipsing and exploding stars. This survey represents a unique laboratory to explore large etendue observations from cadences of about 0.1 days and to test new computational tools for the analysis of large data. This work follows a fully Data Science approach: from the raw data to the analysis and classification of variable sources. We compile a catalog of ~15 million object detections and a catalog of ~2.5 million light-curves classified by variability. The typical depth of the survey is 24.2, 24.3, 24.1 and 23.8 in u, g, r, and i bands, respectively. We classified all point-like non-moving sources by first extracting features from their light--curves and then applying a Random Forest classifier. For the classification, we used a training set constructed using a combination of cross-matched catalogs, visual inspection, transfer/active learning, and data augmentation. The classification model consists of several Random Forest classifiers organized in a hierarchical scheme. The classifier accuracy estimated on a test set is approximately 97%. In the unlabeled data, 3,485 sources were classified as variables, of which 1,321 were classified as periodic. Among the periodic classes we discovered with high confidence, 1 δ scuti, 39 eclipsing binaries, 48 rotational variables, and 90 RR-Lyrae. For the non-periodic classes we discovered 1 cataclysmic variables, 630 QSO, and 1 supernova candidate.","citation:dsDescriptionDate":"2018-11-06"},"subject":"Astronomy and Astrophysics","citation:keyword":[{"citation:keywordValue":"Light-curve catalog"},{"citation:keywordValue":"Variable stars"}],"publication":{"publicationCitation":"Martínez-Palomera, Jorge, & Förster, Francisco. (2018). THE HIGH CADENCE TRANSIENT SURVEY (HITS): Source, light-curve and classification catalogs.","publicationURL":"http://doi.org/10.5281/zenodo.1410651"},"citation:depositor":"Calabrano, Cristián","dateOfDeposit":"2019-06-19","@id":"https://doi.org/10.34691/FK2/9SGXZG","@type":["ore:Aggregation","schema:Dataset"],"schema:version":"1.0","schema:name":"Replicar los datos para: The high cadence transient survey (Hits): Source, light-curve and classification catalogs","schema:dateModified":"2024-01-25 11:13:26.014","schema:datePublished":"2019-06-20","schema:license":"http://creativecommons.org/licenses/by/4.0","dvcore:fileTermsOfAccess":{"dvcore:fileRequestAccess":true},"schema:includedInDataCatalog":"Repositorio de datos de investigación de la Universidad de Chile","schema:isPartOf":{"schema:name":"Facultad de Ciencias Físicas y Matemáticas","@id":"http://datos.uchile.cl/dataverse/FCFM","schema:isPartOf":{"schema:name":"Repositorio de datos de investigación de la Universidad de Chile","@id":"http://datos.uchile.cl/dataverse/uchile","schema:description":"The root dataverse."}},"ore:aggregates":[{"schema:description":"FITS file, 2 HDUs total:\nThe primary HDU; 1 Table HDU(s) \nThe following recognized metadata keys have been found in the FITS file:\nNAXIS; NAXIS1; NAXIS0; \n","schema:name":"HiTS_labeled_set.fits","dvcore:restricted":false,"schema:version":1,"dvcore:datasetVersionId":10,"@id":"doi:10.34691/FK2/9SGXZG/CMX2FI","schema:sameAs":"http://datos.uchile.cl/api/access/datafile/:persistentId?persistentId=doi:10.34691/FK2/9SGXZG/CMX2FI","@type":"ore:AggregatedResource","schema:fileFormat":"application/fits","dvcore:filesize":964800,"dvcore:storageIdentifier":"file://1874d86a658-71276a1ef8aa","dvcore:rootDataFileId":-1,"dvcore:checksum":{"@type":"MD5","@value":"6e3b8aacfe4b980a7f69f06f4caf25f9"}}],"schema:hasPart":["doi:10.34691/FK2/9SGXZG/CMX2FI"]},"@context":{"astrophysics":"http://datos.uchile.cl/schema/astrophysics#","author":"http://purl.org/dc/terms/creator","authorIdentifier":"http://purl.org/spar/datacite/AgentIdentifier","authorIdentifierScheme":"http://purl.org/spar/datacite/AgentIdentifierScheme","citation":"https://dataverse.org/schema/citation/","dateOfDeposit":"http://purl.org/dc/terms/dateSubmitted","dcterms":"http://purl.org/dc/terms/","dvcore":"https://dataverse.org/schema/core#","ore":"http://www.openarchives.org/ore/terms/","publication":"http://purl.org/dc/terms/isReferencedBy","publicationCitation":"http://purl.org/dc/terms/bibliographicCitation","publicationURL":"https://schema.org/distribution","schema":"http://schema.org/","subject":"http://purl.org/dc/terms/subject","title":"http://purl.org/dc/terms/title"}}