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"10 results found.
- GRB 150403A: MASTER-net optical observation
- Konus-Wind observation of GRB 150403A
- GRB 150403A: Swift-BAT refined analysis
- GRB 150403A: Fermi GBM Detection
- GRB 150403A: Swift/UVOT Detection
- GRB 150403A: VLT/X-shooter redshift
- GRB 150403A: Swift-XRT refined Analysis
- GRB 150403A: Fermi-LAT detection
- GRB 150403A: Enhanced Swift-XRT position
- GRB 150403A: Swift detection of a burst with an optical counterpart