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 200714E: Swift-XRT afterglow detection
- GRB 200714E: Fermi GBM observation
- GRB 200714E: Swift-XRT observations
- Fermi GRB 200714E: Global MASTER-Net observations report
- GRB 200714E: AGILE detection
- GRB 200714E: Swift ToO observations
- GRB 200714E: Swift/BAT-GUANO detection and arcminute localization
- GRB 200714E: BALROG localization (Fermi Trigger 616444510 / GRB 200714774)
- GRB 200714E: Fermi GBM Final Real-time Localization