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"7 results found.
- GRB 251126A: TShAO, Mondy, and AbAO optical observations
- GRB 250502A: Mondy and Tien-Shan Optical Observations
- GRB 250103A: TSHAO optical upper limit
- GRB 241207A: TSHAO Zeiss-1000 optical observations
- GRB 240825A: TSHAO Optical Upper Limit
- GRB 240418A: TSHAO Zeiss-1000 optical upper limit
- X-ray transient EP240315a/AT2024eju: TShAO (Zeiss-1000) observatory optical upper limit