ztf.referenceivo://x-unregistred/ztf/ztf_lowercase/referenceALeRCE (Automatic Learning for the Rapid Classification of Events)ALeRCE Teamhttps://tap.alerce.online/favicon.png2026-06-10T02:31:00ZALeRCE Team

Beauchef 851, Edificio Norte, piso 6. Santiago, Chile.

alerce.broker@gmail.comastronomy, objectsZTFtransientstime-series Metadata for the ZTF reference images used in difference imaging, including the photometric properties of the nearest source in the reference image and the temporal extent of the reference image stack.http://tap.alerce.online/tableinfo/ztf.referenceztf Legacy ZTF astronomical catalog containing objects, detections, photometric measurements, classifications, and cross-matches from the Zwicky Transient Facility (ZTF) survey, as processed by the ALeRCE broker pipeline.ztf.reference Metadata for the ZTF reference images used in difference imaging, including the photometric properties of the nearest source in the reference image and the temporal extent of the reference image stack.oidZTF object identifiermeta.id;srccharindexedprimaryrfidReference image field identifiermeta.idlongindexedprimarycandidCandidate identifier associated with this referencemeta.idlongfidFilter identifiermeta.id;instr.filterintindexedrcidReadout channel identifiermeta.id;instr.detintnullablefieldZTF field identifierobs.fieldintnullablemagnrMagnitude of nearest source in reference imagemagphot.magfloatnullablesigmagnrUncertainty in magnitude of nearest source in reference imagemagstat.error;phot.magfloatnullablechinrChi value of nearest source match in reference imagestat.fit.chi2floatnullablesharpnrSharpness of nearest source in reference imagesrc.morph.paramfloatnullableranrRight ascension of nearest source in reference imagedegpos.eq.radoublenullabledecnrDeclination of nearest source in reference imagedegpos.eq.decdoublenullablemjdstartrefMJD of start of reference image stackdtime.startdoublemjdendrefMJD of end of reference image stackdtime.enddoublenframesrefNumber of frames co-added in reference image stackmeta.number;obsint