GCN Circulars
GCN Circulars are rapid bulletins submitted by and distributed to the community. See the documentation for help with subscribing to or submitting Circulars.
Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search
To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"8 results found.
- GRB 221231A: 3.6m DOT optical upper limit
- GRB 221231A: Fermi GBM Observation
- GRB 221231A: Swift-XRT afterglow detection
- GRB 221231A: AKO Upper Limit
- GRB 221231A: Swift-XRT observations
- GRB 221231A: Swift ToO observations
- GRB 221231A: Swift/BAT-GUANO arcminute localization of a possibly short burst
- GRB 221231A: Fermi GBM Final Real-time Localization