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').
8 results found.
- GRB 121201A: X-shooter redshift
- GRB 121201A: GROND afterglow observations and photometric redshift
- GRB 121201A: Swift/UVOT Detection
- GRB 121201A: Swift-XRT refined Analysis
- GRB 121201A: Swift-BAT refined analysis
- GRB 121201A: Enhanced Swift-XRT position
- GRB 121201A: BOOTES-4 optical observations
- GRB 121201A: a GRB with an optical counterpart