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.
- Konus-Wind observation of GRB 171209A
- GRB 171209A: MASTER-Net optical observations
- GRB 171209A: Lulin 1m telescope observations
- GRB 171209A: Swift-BAT refined analysis
- GRB 171209A: Swift/UVOT Analysis of the burst
- GRB 171209A: Swift-XRT refined Analysis
- GRB 171209A: Enhanced Swift-XRT position
- GRB 171209A: LCO 1-m telescope observations
- GRB 171209A: Swift detection of a burst
- Swift Trigger 796098 is probably a noise peak near M31