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 221226B: LCOGT Optical Upper Limits
- GRB 221226B Swift-BAT refined analysis
- GRB 221226B: Swift-UVOT Detection
- GRB 221226B: Fermi GBM Observation
- GRB 221226B: Swift-XRT refined Analysis
- GRB 221226B: VLT/X-shooter redshift and host galaxy
- GRB 221226B: Enhanced Swift-XRT position
- GRB 221226B: Swift detection of a burst
- GRB 221226B: Fermi GBM Final Real-time Localization