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.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"10 results found.
- GRB160709A: Astrosat CZTI detection of short GRB
- GRB 160709A CALET Gamma-Ray Burst Monitor detection
- GRB 160709A: MASTER early imaging Swift BAT error box
- GRB 160709A, Swift-BAT detection and localization
- GRB 160709A: Swift-XRT observations
- GRB 160709A: Global MASTER Net Fermi GBM Alerts observations
- Konus-Wind observation of GRB 160709A (short/hard)
- GRB 160709A: Fermi GBM Observations
- GRB 160709A: Fermi-LAT detection
- GRB 160709A: Tiled Swift observations