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 101213A: Gemini-N galaxy redshift
- GRB 101213A : Suzaku WAM observation of the prompt emission
- Redshift solution(s) for GRB101213A from Swift-XRT data
- Konus-Wind observation of GRB 101213A
- GRB 101213A: Fermi GBM observation
- GRB 101213A, Swift-BAT refined analysis
- GRB 101213A: Swift-XRT refined Analysis
- GRB 101213A: Swift/UVOT Upper Limits
- GRB 101213A: Enhanced Swift-XRT position
- GRB 101213A: Swift detection of a burst