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 120224A: VLT/X-shooter observations
- GRB 120224A: optical observation in Mondy observatory
- GRB 120224A: GROND detection of the afterglow candidate
- GRB 120224A: Swift-XRT refined Analysis
- GRB 120224A: Swift/UVOT Upper Limits
- GRB 120224A: Swift-BAT refined analysis
- GRB 120224A: FTN optical observations
- GRB 120224A: Enhanced Swift-XRT position
- GRB 120224A: Swift detection of a burst