alerce_tap.ztf_oivo://x-unregistred/alerce_tap/multisurvey_lowercase/ztf_objectALeRCE (Automatic Learning for the Rapid Classification of Events)ALeRCE Teamhttps://tap.alerce.online/favicon.png2026-04-11T22:13:50ZALeRCE Team

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

alerce.broker@gmail.comastronomy, objectssurveystransientstime-series ZTF-specific properties for astronomical objects including color indices, stellar classification, photometric correction flags, and historical detection statistics from the Zwicky Transient Facility survey.http://tap.alerce.online/tableinfo/alerce_tap.ztf_objectalerce_tap Multi-survey astronomical object catalog containing astrometric and statistical information from multiple surveys. This table provides aggregated properties for astronomical objects including position, detection statistics, and temporal coverage.alerce_tap.ztf_object ZTF-specific properties for astronomical objects including color indices, stellar classification, photometric correction flags, and historical detection statistics from the Zwicky Transient Facility survey.oidUnique identifier for this objectmeta.id;srclongindexedprimaryg_r_maxMaximum g-r color (difference between minimum g and r band magnitudes)phot.color;stat.maxfloatnullableg_r_max_corrMaximum g-r color using corrected magnitudesphot.color;stat.max;arith.correctedfloatnullableg_r_meanMean g-r color (difference between mean g and r band magnitudes)phot.color;stat.meanfloatnullableg_r_mean_corrMean g-r color using corrected magnitudesphot.color;stat.mean;arith.correctedfloatnullablecorrectedWhether the corrected light curve was computed and can be usedbooleanstellarWhether the object is likely a stellar-like (unresolved) source based on PS1 and ZTF reference image propertiesbooleannullablereference_changeReference image change flag indicating template updatebooleannullablediffposDifference image positivity flagbooleannullablendethistNumber of spatially-coincident detections within 1.5 arcsec going back to beginning of survey; only detections on the same field and readout-channel ID are counted, down to S/N ~ 3intnullablencovhistNumber of times the object position fell on any field and readout-channel going back to beginning of surveyintnullablemjdstarthistEarliest Modified Julian Date corresponding to ndethistdtime.startdoublenullablemjdendhistLatest Modified Julian Date corresponding to ndethistdtime.enddoublenullablecreated_dateDate record was createdtime.creationcharnullable