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.
- GRB 160607A CALET Gamma-Ray Burst Monitor detection
- GRB 160607A: Swift/UVOT Upper Limits
- GRB 160607A: GROND confirmation of the afterglow
- Konus-Wind observation of GRB 160607A
- GRB 160607A: candidate optical afterglow from the NOT
- GRB 160607A: Swift-BAT refined analysis
- GRB 160607A: Swift-XRT refined Analysis
- GRB 160607A: Enhanced Swift-XRT position
- GRB 160607A: Swift detection of a bright burst