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 250901A - SVOM/ECLAIRs refined analysis
- GRB 250901A: Swift/UVOT Upper Limit
- GRB 250901A: EP-FXT follow-up observation
- GRB 250901A: NOT optical observations
- GRB 250901A: SVOM/VT optical afterglow with VHF data
- GRB 250901A: Swift-XRT afterglow detection
- GRB 250901A: LCO optical upper limit
- GRB 250901A: SVOM detection of a burst