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"14 results found.
- GRB 090813: I-band observations from 1.5m OSN telescope
- GRB 090813: Suzaku WAM observation of the prompt emission
- GRB 090813: CrAO optical obsevations
- GRB 090813: correction to GCN 9787
- GRB 090813: Fermi GBM observation
- GRB 090813: Swift-XRT refined analysis
- GRB 090813, Swift-BAT refined analysis
- Konus-Wind observations of GRB090813
- GRB090813: Swift/UVOT upper limits
- GRB 090813: Enhanced Swift-XRT position
- GRB 090813: Liverpool Telescope afterglow confirmation
- GRB 090813: P60 Optical Afterglow Confirmation
- GRB 090813: optical candidate from 1.23m CAHA telescope
- GRB 090813: Swift detection of a burst