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 160321A: 15 GHz upper limits from AMI
- GRB 160321A: AbAO optical observations
- GRB 160321A: Possible RATIR Optical and NIR Detections
- GRB 160321A: Swift/UVOT Upper Limits
- GRB 160321A: Swift-BAT refined analysis
- GRB 160321A: Swift-XRT refined Analysis
- GRB 160321A: Enhanced Swift-XRT position
- GRB 160321A: MASTER observations zero Galaxy latitude GRB
- GRB 160321A: Swift detection of a probable burst