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 110106B, radio observations
- GRB 110106B: MASTER optical observations
- GRB 110106B: early optical and near-IR observations
- GRB 110106B: MASTER early optical observations
- GRB 110106B: Fermi GBM detection
- GRB 110106B: Swift-XRT refined Analysis
- GRB 110106B: Gemini-North / WHT detection of a fading afterglow
- GRB 110106B Gemini-N galaxy redshift
- GRB 110106B: Liverpool Telescope observations
- GRB 110106B: WHT candidate afterglow
- GRB 110106B: Swift-BAT refined analysis
- GRB 110106B: Enhanced Swift-XRT position
- GRB 110106B: Swift detection of a burst