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"11 results found.
- Konus-Wind observation of GRB 141130A
- GRB 141130A: Mondy optical observations
- GRB 141130A: Mondy optical light curve
- GRB 141030A: Nanshan very early optical observations
- GRB 141130A: Swift-BAT refined analysis
- GRB 141130A: Swift/UVOT Detection
- GRB 141130A: Swift-XRT refined Analysis
- GRB 141130A: Enhanced Swift-XRT position
- GRB 141130A: Nanshan optical observations
- GRB 141130A: Mondy optical observations
- GRB 141130A: Swift detection of a burst with an optical counterpart