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 120312A, the review of the sky area in plate archives
- GRB 120312A: CrAO optical upper limit
- GRB 120312A: Gemini and UKIRT imaging
- GRB 120312A: Swift/UVOT Upper Limits
- GRB 120312A: MASTER-NET optical observations
- GRB 120312A: WHT candidate afterglow
- GRB 120312A: NOT observations
- GRB 120312A: Swift-XRT refined Analysis
- GRB 120312A: Swift-BAT refined analysis
- GRB 120312A: Swift detection of a burst