Catalogs

Tables of measurements made on sources and objects detected in the processed images, and tables of survey metadata for the observations.

The schema browser includes column descriptions for all tables.

All catalog data products are available via TAP, and most are also available with the butler.

The “Butler Dataset type” entry on each catalog’s page is of the format (‘datasetTypeName’, {dimension1, dimension2, dimension3}, StorageClass), where dimensions in bold are required dimensions for retrieving datasets of this type. See Butler terminology for more information.

Note

When reading catalogs with the butler, it can be much more efficient to load just a few columns, by adding:

parameters={"columns": list_of_columns}

to a Butler.get call (where list_of_columns is a Python list of str column names).

Object

Measurements on the deep coadd images at the locations of all detected objects.

• Object

Source and forced source

Measurements on the individual images at the locations of all objects.

• Source
• Forced source

Difference image analysis

Measurements on the difference and visit images at the locations of all variable or moving objects.

• DIA object
• DIA source
• DIA forced source

Moving objects

Derived properties for moving objects detected in images.

• SS object
• SS source
• MPCORB

Observations

Observational metadata for visits and detectors.

• Visit
• Visit detector (CcdVisit)