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"10 results found.
- GRB 060115: PROMPT Observations
- GRB060115: REM observations
- GRB 060115: absorption redshift
- GRB 060115: Refined analysis of the Swift-BAT burst
- GRB 060115: OT photometry with MITSuME
- GRB 060115: Swift/UVOT upper limits
- GRB 060115: Swift XRT refined analysis
- GRB 060115: OT finding chart
- GRB 060115: MITSuME optical afterglow candidate
- GRB 060115: Swift detection of a burst