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"11 results found.
- GRB 080804: GROND observations
- GRB 080804: ATCA Radio Observations
- GRB 080804: Swift-XRT Refined Analysis
- GRB 080804: Swift/UVOT Refined Analysis
- GRB 080804, Swift-BAT refined analysis
- GRB 080804: Enhanced Swift-XRT position
- GRB080804: Gemini South redshift confirmation
- GRB 080804: Faulkes Telescope South observations
- GRB 080804: UVES redshift
- GRB 080804: Swift detection of a burst with optical afterglow
- GRB 080804: ROTSE-III Detection of Optical Counterpart