{"id":59,"identifier":"FK2/9SGXZG","persistentUrl":"https://doi.org/10.34691/FK2/9SGXZG","protocol":"doi","authority":"10.34691","publisher":"Repositorio de datos de investigación de la Universidad de Chile","publicationDate":"2019-06-20","storageIdentifier":"file://10.34691/FK2/9SGXZG","datasetVersion":{"id":10,"datasetId":59,"datasetPersistentId":"doi:10.34691/FK2/9SGXZG","storageIdentifier":"file://10.34691/FK2/9SGXZG","versionNumber":1,"versionMinorNumber":0,"versionState":"RELEASED","lastUpdateTime":"2024-01-25T14:13:26Z","releaseTime":"2023-04-04T18:31:21Z","createTime":"2023-04-04T18:30:34Z","license":{"name":"CC-BY 4.0","uri":"http://creativecommons.org/licenses/by/4.0"},"fileAccessRequest":true,"metadataBlocks":{"citation":{"displayName":"Citation Metadata","name":"citation","fields":[{"typeName":"title","multiple":false,"typeClass":"primitive","value":"Replicar los datos para: The high cadence transient survey (Hits): Source, light-curve and classification catalogs"},{"typeName":"author","multiple":true,"typeClass":"compound","value":[{"authorName":{"typeName":"authorName","multiple":false,"typeClass":"primitive","value":"Martínez Palomera, Jorge"},"authorAffiliation":{"typeName":"authorAffiliation","multiple":false,"typeClass":"primitive","value":"Universidad de Chile"},"authorIdentifierScheme":{"typeName":"authorIdentifierScheme","multiple":false,"typeClass":"controlledVocabulary","value":"ORCID"},"authorIdentifier":{"typeName":"authorIdentifier","multiple":false,"typeClass":"primitive","value":"https://orcid.org/0000-0002-7395-4935"}},{"authorName":{"typeName":"authorName","multiple":false,"typeClass":"primitive","value":"Förster, Francisco"},"authorAffiliation":{"typeName":"authorAffiliation","multiple":false,"typeClass":"primitive","value":"Universidad de Chile"},"authorIdentifierScheme":{"typeName":"authorIdentifierScheme","multiple":false,"typeClass":"controlledVocabulary","value":"ORCID"},"authorIdentifier":{"typeName":"authorIdentifier","multiple":false,"typeClass":"primitive","value":"https://orcid.org/0000-0003-3459-2270"}}]},{"typeName":"datasetContact","multiple":true,"typeClass":"compound","value":[{"datasetContactName":{"typeName":"datasetContactName","multiple":false,"typeClass":"primitive","value":"Martínez Palomera, Jorge"},"datasetContactAffiliation":{"typeName":"datasetContactAffiliation","multiple":false,"typeClass":"primitive","value":"Universidad de Chile"},"datasetContactEmail":{"typeName":"datasetContactEmail","multiple":false,"typeClass":"primitive","value":"ccalabrano@uchile.cl"}}]},{"typeName":"dsDescription","multiple":true,"typeClass":"compound","value":[{"dsDescriptionValue":{"typeName":"dsDescriptionValue","multiple":false,"typeClass":"primitive","value":"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."},"dsDescriptionDate":{"typeName":"dsDescriptionDate","multiple":false,"typeClass":"primitive","value":"2018-11-06"}}]},{"typeName":"subject","multiple":true,"typeClass":"controlledVocabulary","value":["Astronomy and Astrophysics"]},{"typeName":"keyword","multiple":true,"typeClass":"compound","value":[{"keywordValue":{"typeName":"keywordValue","multiple":false,"typeClass":"primitive","value":"Light-curve catalog"}},{"keywordValue":{"typeName":"keywordValue","multiple":false,"typeClass":"primitive","value":"Variable stars"}}]},{"typeName":"publication","multiple":true,"typeClass":"compound","value":[{"publicationCitation":{"typeName":"publicationCitation","multiple":false,"typeClass":"primitive","value":"Martínez-Palomera, Jorge, & Förster, Francisco. (2018). THE HIGH CADENCE TRANSIENT SURVEY (HITS): Source, light-curve and classification catalogs."},"publicationURL":{"typeName":"publicationURL","multiple":false,"typeClass":"primitive","value":"http://doi.org/10.5281/zenodo.1410651"}}]},{"typeName":"depositor","multiple":false,"typeClass":"primitive","value":"Calabrano, Cristián"},{"typeName":"dateOfDeposit","multiple":false,"typeClass":"primitive","value":"2019-06-19"}]},"astrophysics":{"displayName":"Astronomy and Astrophysics Metadata","name":"astrophysics","fields":[{"typeName":"astroType","multiple":true,"typeClass":"controlledVocabulary","value":["Table"]}]}},"files":[{"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","label":"HiTS_labeled_set.fits","restricted":false,"version":1,"datasetVersionId":10,"dataFile":{"id":60,"persistentId":"doi:10.34691/FK2/9SGXZG/CMX2FI","pidURL":"https://doi.org/10.34691/FK2/9SGXZG/CMX2FI","filename":"HiTS_labeled_set.fits","contentType":"application/fits","filesize":964800,"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","storageIdentifier":"file://1874d86a658-71276a1ef8aa","rootDataFileId":-1,"md5":"6e3b8aacfe4b980a7f69f06f4caf25f9","checksum":{"type":"MD5","value":"6e3b8aacfe4b980a7f69f06f4caf25f9"},"creationDate":"2023-04-04"}}],"citation":"Martínez Palomera, Jorge; Förster, Francisco, 2019, \"Replicar los datos para: The high cadence transient survey (Hits): Source, light-curve and classification catalogs\", https://doi.org/10.34691/FK2/9SGXZG, Repositorio de datos de investigación de la Universidad de Chile, V1"}}