GCN Circulars
GCN Circulars are rapid bulletins submitted by and distributed to the community. 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"10 results found.
- GRB 070420, SMARTS optical/IR afterglow observations
- GRB 070420: pseudo-z~1.56 from spectral parameters of the prompt
- Konus-Wind observation of GRB 070420
- GRB 070420 Swift-BAT Refined Analysis
- GRB 070420: optical rebrightening observed at Mt. John
- GRB 070420: Swift XRT refined analysis
- GRB 070420: Faulkes Telescope South Observations
- GRB 070420: TAROT La Silla observatory optical observations
- GRB 070420: NIR and optical afterglow confirmed
- GRB 070420: Swift detection of a burst with optical afterglow