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"14 results found.
- GRB 110709A / EVLA upper limits
- GRB 110709A: Suzaku WAM observation of the prompt emission
- GRB 110709A: Swift/UVOT Upper Limits
- GRB 110709A: Konkoly observations
- GRB 110709A: Swift-XRT refined Analysis
- GRB110709A: MITSuME Ishigakijima Optical upper limits
- Konus-Wind observation of GRB 110709A
- GRB 110709A: Fermi GBM observation
- GRB 110709A: Swift-BAT refined analysis
- GRB 110709A : Xinglong TNT upper limit
- GRB 110709A: Enhanced Swift-XRT position
- GRB 110709A: MASTER-NET optical observations
- GRB 110709A: Prompt enhanced Swift-XRT position
- GRB 110709A: Swift detection of a burst