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 061019: MITSuME upper limits
- GRB 061019: Super-LOTIS upper limit
- GRB 061019: SARA upper limit
- GRB 061019: dust-scattered X-ray halo detected in Swift/XRT
- GRB 061019: Swift/UVOT upper limit
- GRB 061019: SMARTS afterglow confirmation
- GRB061019: Swift XRT refined analysis
- GRB 061019, Swift-BAT refined analysis
- GRB 061019: TAROT La Silla observatory optical observations
- GRB 061019: REM K-band candidate afterglow
- GRB061019: Swift/XRT position
- GRB 061019: Swift-BAT detection of a burst