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"10 results found.
- GRB 130514A: Konus-Wind and Swift/BAT joint spectral analysis
- GRB 130514A: Swift-XRT refined Analysis
- GRB 130514A: Skynet/PROMPT/DSO Detections
- GRB 130514A: RATIR Optical and NIR Observations
- GRB 130514A: Swift/UVOT Upper Limits
- GRB 130514A: Enhanced Swift-XRT position
- GRB 130514A: Swift-BAT refined analysis
- GRB 130514A: GROND optical-NIR afterglow discovery and photo-z
- GRB 130514A: P60 Observations
- GRB 130514A: Swift detection of a burst