GCN Circulars
GCN Circulars are rapid bulletins submitted by and distributed to the community. 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"11 results found.
- GRB 050401: Rc observation
- GRB 050401: Optical limit
- Konus-Wind observation of GRB 050401
- GRB050401: Radio observation at 610 MHz with GMRT
- GRB 050401: VLT spectroscopic redshift
- GRB 050401 Optical Observations
- GRB 050401 BAT refined analysis
- GRB 050401: Optical afterglow confirmed
- GRB 050401: Optical afterglow candidate
- Swift-BAT detection of GRB 050401
- GRB 050401: Prompt XRT position