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').
20 results found.
- GRB 230217A: ATCA rapid-response radio detection
- GRB 230217A: VLT/FORS2 optical observations and candidate counterpart
- GRB 230217A: Swift/UVOT Upper Limits
- GRB 230217A: Continued Gemini Observations
- GRB 230217A: Swift-XRT afterglow detection
- GRB 230217A: Swift-BAT refined analysis
- GRB 230217A: AstroSat CZTI detection
- GRB 230217A: Gemini South optical upper limits
- GRB 230217A: 6 GHz VLA observations
- GRB 230217A: Gemini-South Optical Observation
- IceCube-230217A: Upper limits from a search for additional neutrino events in IceCube
- GRB 230217A: Fermi GBM observation
- IceCube-230217A: BOOTES-4/MET Optical Observations
- Fermi-LAT gamma-ray observations of IceCube-230217A
- Konus-Wind detection of GRB 230217A
- GRB 230217A: Swift-XRT observations
- GRB 230217A: AGILE/MCAL detection
- GRB 230217A: Swift detection of a short burst
- GRB 230217A: Fermi GBM Final Real-time Localization
- IceCube-230217A - IceCube observation of a high-energy neutrino candidate track-like event