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"13 results found.
- GRB 060807: Detection of a possible host galaxy
- GRB060806 is similar to previous activity of SGR1806-20
- GRB 060807: UVOT Upper limits
- GRB 060807: afterglow confirmation
- GRB 060807: XRT Team refined analysis
- GRB 060807: K- and R-band observations
- GRB 060807: Refined analysis of the Swift-BAT burst
- GRB060807: optical afterglow candidate
- GRB060807: optical upper limit in white light
- GRB 060807, optical observation
- GRB 060807: Kanazawa R-band observation
- GRB 060807: optical limit
- GRB 060807: Swift detection of a burst