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"13 results found.
- GRB 231110A: CALET Gamma-Ray Burst Monitor detection
- GRB 231110A: Swift-BAT refined analysis
- GRB 231110A: Swift-UVOT Upper Limits
- GRB 231110A: Glowbug gamma-ray detection
- GRB 231110A: AstroSat CZTI detection
- GRB 231110A: Terskol Zeiss-2000 optical upper limit
- GRB 231110A: GECAM-B detection (correction)
- GRB 231110A: GECAM detection
- GRB 231110A: GOTO optical upper limits
- GRB 231110A: SAO RAS optical observations
- GRB 231110A: Swift-XRT afterglow detection
- GRB231110A: WFST Observation and upper limits
- GRB 231110A: Swift detection of a burst