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 061006: astrometry-corrected XRT position
- GRB 061006: optical afterglow
- GRB 061006 : Suzaku/WAM observation of the prompt emission
- GRB 061006: Swift/UVOT optical observations
- Konus-Wind observation of the short hard GRB 061006
- GRB 061006: VLT observation
- GRB 061006: Swift-BAT refined analysis of the short-hard burst
- GRB 061006: Swift-XRT Team Refined Analysis
- GRB061006: Faulkes Telescope South Observations
- GRB 061006: Swift detection of a burst