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 161202A: 15 GHz upper limits from AMI
- Konus-Wind observation of GRB 161202A
- GRB 161202A: Astrosat CZTI detection
- GRB 161202A: RATIR Optical and NIR Observations
- GRB 161202A: Swift-BAT refined analysis
- GRB 161202A: Swift/UVOT Upper Limits
- GRB 161202A: Swift-XRT refined Analysis
- GRB 161202A: MITSuME Okayama upper limits
- GRB 161202A: Fermi-LAT detection
- GRB 161202A: Enhanced Swift-XRT position
- GRB 161202A: Swift detection of a burst