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"14 results found.
- GRB 080710: Optical observation with MITSuME Okayama
- GRB 080710: TLS observations, steepening afterglow decay
- GRB 080710: Lick IR detection
- GRB 080710, Swift-BAT refined analysis
- GRB 080710: Rapid PROMPT Observations
- GRB 080710: Swift-XRT refined analysis
- GRB 080710: Enhanced Swift-XRT position
- GRB 080710: Faulkes Telescope North observations
- GRB 080710: Gemini spectroscopy and probable redshift
- UVOT white band observations of GRB080710
- GRB 080710: REM afterglow confirmation & brightening
- GRB 080710: KAIT OA candidate
- GRB 080710: Swift XRT position
- GRB 080710: Swift detection of a burst