alerce_tap.ztf_nivo://x-unregistred/alerce_tap/multisurvey_lowercase/ztf_non_detectionALeRCE (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 non-detection upper limits providing 5-sigma magnitude limits from difference images when an object was not detected, useful for constraining object brightness and variability.http://tap.alerce.online/tableinfo/alerce_tap.ztf_non_detectionalerce_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_non_detection ZTF non-detection upper limits providing 5-sigma magnitude limits from difference images when an object was not detected, useful for constraining object brightness and variability.oidUnique identifier for this objectmeta.id;srclongindexedprimarysidSurvey identifiermeta.idshortbandFilter ID: 1=g, 2=r, 3=iinstr.bandpassshortmjdObservation Modified Julian Date at start of exposure when non-detection occurreddtime.epochdoubleindexedprimarydiffmaglim5-sigma magnitude limit in difference image based on PSF-fit photometry, providing upper limit for object brightnessmagphot.mag;stat.minfloatcreated_dateDate record was createdtime.creationcharnullable