Source

Measurements for sources detected in processed visit images.

Schema: Source table

Access

The source table is accessible via the TAP and Butler services.

Recommended access service: TAP

TAP

• Citation: NSF-DOE Vera C. Rubin Observatory (2026); Legacy Survey of Space and Time Data Preview 2: Source searchable catalog https://doi.org/10.71929/rubin/3382538 [BibTeX]

• Table name: Source

• Columns: 154

• Rows: 17,566,180,086

Butler

• Citation: NSF-DOE Vera C. Rubin Observatory (2026); Legacy Survey of Space and Time Data Preview 2: source dataset type https://doi.org/10.71929/rubin/3382537 [BibTeX]

• Dataset type: (‘source’, {band, instrument, day_obs, physical_filter, visit}, ArrowAstropy)

• Format: Parquet

• Number of Butler datasets: 28,589

Description

A “source” is a signal-to-noise ratio > 5 detection in a visit image.

The source table contains measurements on a visit image at the coordinates of every source detected in that image.

Measurements include PSF and Gaussian fluxes and sizes, as well as processing pixel flags.

Processing

The source table is the result of Source detection and measurement.

Tutorials

See the 200-level catalog Tutorials for a notebook on the source table.