Coadd patches

Coordinates and regions for the patches of the all-sky map.

Schema: CoaddPatches table

Access

The coadd patches catalog is accessible via the TAP service only.

TAP

• Table name: CoaddPatches

• Columns: 5

• Rows: 652

Description

The LSST all-sky map is divided into “tracts” (about the size of the LSSTCam field of view, 9.6 square degrees). Each tract is subdivided into “patches”: quadrilateral sub-regions that each cover approximately 128 square arcminutes (about the size of one LSSTCam detector).

The tracts are numbered with unique four-digit numbers, and the patches with non-unique three-digit numbers. To uniquely identify a patch, both the tract and patch numbers are required.

Tutorials

See the 200-level notebook tutorial demonstrating how to access the coadd patches table.