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"9 results found.
- GRB 111211A: Detection of the SN with the 10.4m GTC
- GRB 111211A: optical ovservations at Mt. Terskol observatory
- GRB 111211A: Swift/UVOT Detection
- GRB 111211A: VLT/X-shooter redshift
- Konus-Wind observation of GRB 111211A
- GRB 111211A: NOT afterglow confirmation
- GRB 111211A: Swift/XRT target of opportunity observation
- GRB 111211A: GROND afterglow candidate
- GRB 111211A: SuperAGILE localization of a long GRB