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 080604: VLA radio upper limit
- GRB 080604: Xinglong R band observation
- GRB 080604: MITSuME Okayama observation
- GRB 080604: Gemini-North spectroscopy
- GRB 080604, Swift-BAT refined analysis
- GRB 080604: Swift-XRT refined analysis
- GRB 080604: Enhanced Swift-XRT position
- GRB 080604: Hobby-Eberly Telescope spectroscopy
- GRB 080604: Early Super-LOTIS Observations
- GRB 080604: Swift detection of a burst with an optical afterglow