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"7 results found.
- GRB 171212C CALET Gamma-Ray Burst Monitor detection
- GRB 171212A/Swift J1935.7+2036: Swift-BAT refined analysis
- GRB 171212A: Swift-XRT refined Analysis
- GRB 171212A/Swift J1935.7+2036: Swift/UVOT Upper Limits
- GRB 171212A/Swift J1935.7+2036: TSHAO optical observations
- GRB 171212A: Enhanced Swift-XRT position
- GRB 171212A: Swift detection of a burst or a Galactic transient