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"13 results found.
- GRB 160408A: 15 GHz upper limits from AMI
- GRB 160408A: CALET Gamma-Ray Burst Monitor detection
- GRB 160408A: 6.0 GHz VLA upper limit
- GRB 160408A: GMG observation limit
- GRB 160408A: Gemini afterglow confirmation
- GRB 160408A: TLS Tautenburg observations
- GRB 160408A: Swift/UVOT Upper Limits
- GRB 160408A: Swift-XRT refined Analysis
- GRB 160408A: Fermi GBM detection
- GRB 160408A: Swift-BAT refined analysis
- GRB 160408A: Gemini optical observations
- GRB 160408A: Enhanced Swift-XRT position
- GRB 160408A: Swift detection of a short burst