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"13 results found.
- GRB 130727A: Watcher optical limit
- GRB 130727A: Swift/UVOT Detection
- Konus-Wind observation of GRB 130727A
- GRB 130727A: Swift-XRT refined Analysis
- GRB 130727A: Fermi GBM detection
- GRB 130727A: GROND observations
- GRB 130727A: Enhanced Swift-XRT position
- GRB 130727A: Faulkes Telescope South optical afterglow
- GRB 130727A: Swift-BAT refined analysis
- GRB 130727A: Swift-XRT observations
- GRB 130727A: Swift-XRT and Swift-UVOT prompt observations
- GRB 130727A: Swift detection of a burst
- GRB 130327A: RATIR Optical/NIR afterglow confirmation