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').
21 results found.
- GRB 210610B: correction to GCN 30181
- GRB 210610B: iTelescope optical afterglow observations
- GRB 201223A: SVOM-GWAC detected the optical counterpart during prompt emission phase
- GRB 201223A: AROMA-N Optical Observation
- GRB 201223A: Swift/UVOT Detection
- GRB 201223A: HCT optical upper limit
- GRB 201223A: AbAO optical observations
- GRB 201223A: 1.3m DFOT and 1.04m ST optical observations
- GRB 201223A: Swift-XRT refined Analysis
- GRB 201223A: Enhanced Swift-XRT position
- GRB 201223A: NOT optical upper limit and NEXT powerlaw decay
- GRB 201223A: GROWTH-India Telescope (GIT) photometric follow-up.
- GRB 201223A: Mondy and Kitab optical observations
- GRB 201223A: GWAC-F60A optical afterglow observations
- GRB 201223A: iTelescope optical afterglow observations
- GRB 201223A: MITSuME Akeno optical observation
- GRB 201223A: Swift-BAT refined analysis
- GRB 201223A: Fermi GBM Detection
- GRB 201223A: BOOTES-4/MET early optical observation
- GRB 201223A: Nanshan/NEXT early optical afterglow detection
- GRB 201223A: Swift detection of a burst with a bright optical counterpart