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.
- Fermi GBM Sub-Threshold Detection of GRB 210725B
- GRB 210725B: Swift/UVOT Upper Limits
- GRB 210725B: Swift-XRT refined Analysis
- GRB 210725B: Swift-BAT refined analysis
- Swift GRB 210725B: Global MASTER-Net observations report
- GRB 210725B: Enhanced Swift-XRT position
- GRB 210725B: Swift detection of a burst