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"11 results found.
- GRB 091109B: Suzaku WAM observation of the prompt emission
- GRB 091109B: Swift/UVOT Upper Limits
- GRB 091109B: VLT afterglow confirmation
- GRB 091109B: Swift-XRT Team refined analysis
- GRB 091109B: VLT observations
- GRB 091109b: Magellan Observations
- GRB 091109B: Swift-BAT refined analysis
- GRB 091109B: Enhanced Swift-XRT position
- GRB 091109B: Optical limits from Watcher
- GRB 091109B: ROTSE-III Optical Limits
- GRB 091109B: Swift detection of a short burst