Catalog of Gamma-Ray Bursts: Annulus Regions

For a given GRB the localization can be provided by different observatories with different region types or by the same region type with different parameters. The different region types reported in literature are the following: circle, annulus, box, dual, annulus intersect, irregular, and intersect.

This table contains the description only for the annulus region type, the other types are stored in separate tables. The annulus region is described by a center given in RA and Dec, the radius of the annulus (corresponding to the center betewen the inner and outer radii) and by the half-width of the annulus. The measurements are reported as found in literature and any differences or remarks are included in one of the table parameter (local_notes).