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"12 results found.
- Konus-Wind observation of GRB 181110A
- GRB 181110A: optical observations in Chilescope observatory
- GROND observations of GRB181110A
- GRB 181110A: VLT/X-shooter redshift
- GRB 181110A, Swift-BAT refined analysis
- GRB 181110A: Swift/UVOT Detection
- GRB 181110A: Swift-XRT refined Analysis
- GRB 181110A: Enhanced Swift-XRT position
- GRB 181110A: optical observations from iTelescope SSO
- GRB 181110A: MITSuME Akeno optical observation
- GRB 181110A: Kanata 1.5m optical observation
- GRB 181110A: Swift detection of a burst with an optical counterpart