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.
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
8 results found.
- GRB 090313: Sustained optical brightness (correction)
- GRB 090309, Swift-BAT lag analysis
- GRB 090309A: GROND upper limits
- GRB 090309: Swift/UVOT Upper Limits
- GRB 090309: Swift-XRT refined analysis
- GRB 090309: Enhanced Swift-XRT position
- GRB 090309, Swift-BAT refined analysis
- GRB 090309: Swift detection of a burst