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.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"17 results found.
- GRB 071011: MITSuME Optical Observations
- VLA non-detection of GRB 071011
- GRB 071011: Optical Limit after 13.95hrs
- GRB 071011: Xinglong TNT Optical afterglow observations
- GRB 071011: Swift-XRT refined analysis
- GRB 071011: NAYUTA Optical Observation, correction to GCN6886
- GRB 071011, Optical afterglow
- GRB 071011: Confirmation of P60 optical afterglow
- GRB 071011: Kanazawa Optical limits
- GRB 071011: P60 Optical Afterglow Candidate
- GRB 071011: MARGE Optical Limits
- GRB 071011: XRT afterglow detection
- GRB 071011, Swift-BAT refined analysis
- GRB 071011: Early Super-LOTIS Observations
- GRB 071011: NAYUTA Optical Observation
- GRB 071011: Optical afterglow candidate
- GRB 071011: Swift detection of a burst