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"11 results found.
- GRB 060607: RTT150 optical observations
- GRB 060607B: Swift-BAT Refined Analysis
- GCN 060607: Swift-UVOT obswervations.
- GRB 060607: Swift-BAT Refined Analysis
- GRB 060607: optical limit by "Pi of the Sky"
- GRB 060607: Swift-XRT Team refined analysis
- GRB 060607: IR observations
- VLT/UVES observations of GRB 060607
- GRB 060607: PROMPT Observations
- GRB 060607: REM NIR afterglow
- GRB 060607: Swift detection of a burst with bright optical counterpart