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.
- GRB 160325A: Skynet PROMPT-CTIO observations of the optical afterglow
- Konus-Wind observation of GRB 160325A
- GRB 160325A, Swift-BAT refined analysis
- GRB 160325A: GROND Upper Limits
- GRB 160325A: Swift-XRT refined Analysis
- GRB 160325A: Further Swift/UVOT Observations
- GRB 160325A: afterglow confirmation
- GRB 160325A: Enhanced Swift-XRT position
- GRB 160325A: Fermi-LAT detection
- GRB 160325A: Fermi GBM detection
- GRB160325A: REM NIR observations
- GRB 160325A: Swift detection of a burst