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"9 results found.
- GRB 141017A: Skynet PROMPT-CTIO/SSO Observations
- Konus-Wind observation of GRB 141017A
- GRB 141017A, Swift-BAT refined analysis
- GRB 141017A: GROND Afterglow Confirmation
- GRB 141017A: Swift/UVOT Detection
- GRB 141017A: Swift-XRT refined Analysis
- GRB 141017A: Enhanced Swift-XRT position
- GRB 141017A: Zadko observatory - Gingin optical observations
- GRB 141017A: Swift detection of a burst