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"9 results found.
- GRB 150523A: Suzaku WAM observation of the prompt emission
- GRB 150523A: Swift ToO observations
- GRB 150523A: Swift/UVOT Detection
- Konus-Wind observation of GRB 150523A
- GRB 150523A: LCOGT FTS afterglow confirmation
- GRB 150523A: LCOGT Cerro-Tololo optical afterglow candidate
- GRB 150523A Swift-XRT afterglow detection
- GRB 150523A: Fermi-LAT detection
- GRB 150523A: Fermi GBM detection