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').
9 results found.
- GRB 191029A: Swift-BAT refined analysis
- GRB 191029A: CORRECTED Swift-XRT refined analysis
- GRB 191029A: Swift/UVOT Upper Limits
- GRB 191029A: Enhanced Swift-XRT position
- GRB 191029A: Swift-XRT refined Analysis
- GRB 191029A: BOOTES-4/MET optical limit
- GRB 191029A: iTelescope optical upper limits
- GRB 191029A: Swift-XRT observations
- GRB 191029A: Swift detection of a burst