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').
Advanced Search
To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"10 results found.
- Konus-Wind observation of GRB 200205B
- GRB 200205B: Chilescope optical observations
- GRB 200205B: Swift-BAT refined analysis
- GRB 200205B: Swift/UVOT Detection
- GRB 200205B: ESO/NTT near-infrared imaging
- GRB 200205B: Swift-XRT refined Analysis
- GRB 200205B: Enhanced Swift-XRT position
- GRB 200205B: VLT/X-shooter redshift
- GRB 200205B: LCO Optical Detection
- GRB 200205B: Swift detection of a burst with optical counterpart