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.
Lucene Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"12 results found.
- Short GRB 121226A: TNG observation of the host galaxy
- GRB 121226A: 5.8 GHz VLA observations
- GRB 121226A: 10.4m GTC optical observations
- GRB 121226A: Swift/UVOT Upper Limits
- GRB 121226A: Swift-XRT refined Analysis
- GRB 121226A, Swift-BAT refined analysis
- GRB 121226A: NOT optical upper limit
- GRB 121226A: Optical Observations
- GRB 121226A: MITSuME Okayama Optical upper limits
- GRB 121226A: Zadko observatory - Gingin optical observations
- GRB 121226A: BOOTES-4/MET optical observations
- GRB 121226A: Swift detection of a burst