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"10 results found.
- GRB 140301A: Zadko observatory - Gingin optical observations
- GRB 140301A: Swift/UVOT Upper Limits
- GRB 140301A: Swift-BAT refined analysis
- GRB 140301A: Swift-XRT refined Analysis
- GRB 140301A: GROND Detection of the Optical/NIR Afterglow
- GRB 140301A: VLT/X-shooter redshift
- GRB 140301A: NOT afterglow candidate
- GRB 140301A: Enhanced Swift-XRT position
- GRB 140301A: Skynet R-COP Observations
- GRB 140301A: Swift detection of a burst