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.
Lucene Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"13 results found.
- GRB 190114B: continued optical observations in Mondy
- GRB 190114B: Swift-XRT refined Analysis
- GRB 190114B: Liverpool Telescope near-IR observations
- GRB 190114B: optical afterglow observations in Mondy and Abastumani observatories
- GRB 190114B, Swift-BAT refined analysis
- GRB 190114B: Swift/UVOT Upper Limits
- GRB 190114B: NOT optical counterpart
- GRB 190114B: MITSuME Akeno optical upper limits
- GRB 190114B: GWAC-F60B upper limit
- GRB 190114B: Mondy optical afterglow detection
- GRB 190114B: BOOTES-4/MET optical afterglow detection
- GRB 190114B: Enhanced Swift-XRT position
- GRB 190114B: Swift detection of a burst