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 120816A: Swift/UVOT Detection of the Optical Afterglow
- GRB 120815A: MASTER-ICATE observations
- GRB 120815A: Swift/UVOT Detection of the Optical Afterglow
- GRB 120815A: Swift-XRT refined Analysis
- GRB 120815A: Swift-BAT refined analysis
- GRB 120815A: Enhanced Swift-XRT position
- GRB 120815A: VLT/X-shooter redshift
- GRB 120815A: GROND afterglow candidate
- GRB 120815A: Swift-XRT observations
- GRB 120815A: TAROT La Silla observatory optical observations
- GRB 120815A: Swift detection of a burst