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"22 results found.
- GRB 070411: TAROT Calern observatory optical observations
- GRB 070411, further deep LBT photometry
- GRB 070411: Late-time Keck imaging
- GRB 070411 : Planned XMM-Newton observation
- GRB 070411, deep LBT photometry
- GRB 070411: break in the optical light curve
- GRB 070411: BART early limit
- GRB 070411: Deep VLT detection
- GRB 070411: TLS data shows plateau, flares
- GRB 070411: Swift/UVOT observations
- GRB 070411: Optical photometry at Crni Vrh
- GRB 070411: Swift-XRT refined analysis
- GRB 070411: OA redshift
- GRB 070411: Magellan/Clay photometry
- GRB 070411: Magellan/IMACS photometry
- GRB 070411, Swift-BAT refined analysis
- GRB 070411: IAC80 optical observations
- GRB 070411 : Liverpool Telescope Observations
- GRB 070411: Optical observations at Crni Vrh
- GRB 070411: ROTSE-III Detection of Optical Counterpart
- GRB 070411: Tautenburg RRM Afterglow Confirmation
- GRB 070411: Swift detection of a burst with optical afterglow