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 090625B: Fermi GBM observation
- GRB 090625B: Swift/UVOT Upper Limits
- GRB 090625B: Swift-XRT refined analysis
- GRB 090625B: GROND upper limits
- GRB 090625B: Faulkes Telescope South observations
- GRB 090625B: Swift observation of the INTEGRAL GRB 090625B
- GRB 090625B: a long GRB localized by INTEGRAL