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"20 results found.
- GRB 140206A: Bassano Bresciano Observatory optical upper limit
- GRB 140206A: Mondy optical observations
- GRB 140206A: Liverpool Telescope optical afterglow observations
- GRB 140206A, Swift-BAT refined analysis
- GRB 140206A: MITSuME Akeno detection of the optical counterpart
- GRB 140206A: TNG redshift confirmation
- GRB 140206A: Optical Observations via Virtual Telescope
- GRB 140206A: NOT redshift
- GRB 140206A: TNG optical observations
- GRB 140206A: Swift-XRT refined Analysis
- GRB 140206A: T100 observations
- GRB 140206A: Fermi GBM detection
- GRB 140206A: Swift/UVOT Detection
- GRB 140206A: theoretical prediction of redshift and of supernova occurrence
- GRB 140206A: Enhanced Swift-XRT position
- GRB 140206A: ISON-Ussuriysk optical observations
- GRB 140206A: Nanshan optical observations
- GRB 140206A: MASTER OT detection
- GRB 140206A: Swift/UVOT optical detection
- GRB 140206A: Swift detection of a burst