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"10 results found.
- GRB 220117B: TARGET optical upper limit
- GRB 220117B: z-band limit
- GRB 220117B: Swift-BAT refined analysis
- GRB 220117B: Swift/UVOT Upper Limits
- GRB 220117B: Swift-XRT refined Analysis
- GRB 220117B: Nanshan/NEXT optical upper limit
- GRB 220117B: MITSuME Akeno optical upper limits
- GRB 220117B: Enhanced Swift-XRT position
- Swift GRB 220117B: Global MASTER-Net observations report
- GRB 220117B: Swift detection of a burst