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.
- GRB100423A : Suzaku WAM observation of the prompt emission
- GRB 100423A: xinglong TNT optical upper limit
- Konus-Wind observation of GRB 100423A
- GRB 100423A: CrAO optical observations
- GRB100423A: MITSuME optical upper limits
- GRB 100423A: Swift-BAT refined analysis
- GRB 100423A: Skynet/PROMPT Detections
- GRB 100423A: GROND discovery of afterglow
- GRB 100423A: Swift detection of a burst