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"8 results found.
- Konus-Wind detection of GRB 250716A
- GRB 250716A: Swift-XRT afterglow detection
- GRB 250716A: Lesedi Detection of Fading Optical Transient GOTO25eyp
- GRB 250716A: Swift ToO observations
- GRB 250716A: GOTO tentative optical counterpart candidate
- GRB 250716A: Fermi GBM Observation
- Fermi GRB 250716A: Global MASTER-Net observations report
- GRB 250716A: Fermi GBM Final Real-time Localization