GCN Circulars
GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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 190211A: Tautenburg observations
- GRB 190211A: Swift/UVOT Detection
- GRB 190211A: DOAO optical observation
- GRB190211A: MITSuME Akeno optical observation
- GRB 190211A: NOT optical observations
- GRB 190211A: Swift-XRT refined Analysis
- GRB 190211A: Swift-BAT refined analysis
- GRB 190211A: BOOTES-4/MET optical afterglow confirmation
- GRB 190211A: NEXT-0.6m optical afterglow detection
- GRB 190211A: Swift detection of a burst