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.
- Radio upper limit on the GRB 161011A with the GMRT
- GRB 161011A: 15 GHz upper limits from AMI
- GRB 161011A: RATIR Optical and NIR Observations
- GRB 161011A, Swift-BAT refined analysis
- GRB 161011A: Swift burst of interest
- GRB 161011A: TSHAO afterglow candidate
- GRB 161011A: Swift/UVOT Upper Limits
- GRB 161011A: Swift-XRT refined Analysis
- GRB 161011A: Enhanced Swift-XRT position
- GRB 161011A: Prompt enhanced Swift-XRT position
- GRB 161011A: Swift detection of a burst