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"11 results found.
- Errartum: VLA upper limit on GRB 080507
- VLA upper limit on GRB 080705
- Konus-Wind observation of GRB 080507
- GRB 080507: Suzaku WAM observation of the prompt emission
- GRB 080507: Swift XRT analysis confirms the X-ray afterglow
- GRB 080507: Keck photometry
- GRB 080507: E Pur Si Muove!
- GRB080507: Swift/UVOT followup observations
- GRB 080507: Optical Afterglow
- GRB 080507: Swift-XRT position of a possible afterglow
- GRB 080507: GRB localization by SuperAGILE