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"13 results found.
- GRB 100614A: 10.4-m GTC deep-optical limit
- GRB 100614A: CrAO optical limit
- GRB 100614A: Gemini/NIRI Observations
- GRB 100614A: Swift/UVOT Upper Limits
- GRB 100614A: NOT optical upper limits
- GRB 100614A: MASTER-Net optical alert observations
- GRB 100614A: Swift-BAT refined analysis
- GRB 100614A: Enhanced Swift-XRT position
- GRB 100614A: Swift-XRT refined analysis
- GRB 100614A: WHT I-band observations
- GRB 100614A: BOOTES-2/TELMA optical observations
- GRB 100614A: Liverpool Telescope Observations
- GRB 100614A: Swift detection of a burst