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').
5 results found.
- Corrections: GRB 190404A (not 140404B ) and GRB 190404B (not 140404C)
- GRB 190404C: MITSuME Akeno and Okayama optical upper limits
- GRB 190404C: Swift-XRT afterglow detection
- GRB 190404C: Swift-XRT observations
- GRB 140404C: MAXI/GSC detection