Object

Measurements of objects detected in deep coadd images.

Schema: Object table

Access

The object catalog is accessible via the TAP and Butler services.

Recommended access service: TAP

TAP

  • Citation: NSF-DOE Vera C. Rubin Observatory (2025); Legacy Survey of Space and Time Data Preview 1: Object searchable catalog DOI Logo https://doi.org/10.71929/rubin/2570325 [BibTeX]

  • Table name: Object

  • Columns: 1,296

  • Rows: 2,299,757

Butler

Note

The Object catalog is extremely wide. Loading just the columns you need is strongly recommended (see note under Catalogs).

Description

An “object” is an astrophysical object at a static sky coordinate.

The object catalog contains forced measurements on the deep coadd images at the coordinates of every object detected with signal-to-noise ratio >5 in a deep coadd image of any filter.

Measurements include PSF and extended fluxes, shapes, and sizes, as well as processing pixel flags. Photometry is calibrated, but not corrected for Milky Way dust extinction.

Objects are detected and deblended in each patch independently, including the “outer” patch regions that overlap. They are then filtered down to just those whose reference-band centroid falls within the inner (non-overlapping) patch bounds when per-patch catalogs are aggregated.

Processing

The object catalog is the result of Source detection and measurement.

Tutorials

See the 200-level notebook or 200-level portal tutorials demonstrating how to access the object table.