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"17 results found.
- Update to the configuration of the Fermi-LAT onboard GRB search
- GRB 090902B: Skynet/PROMPT Observations
- GRB 090902B: Suzaku WAM observation of the prompt emission
- GRB 090902B: VLA radio detection
- GRB 090902B: WSRT Radio Observation
- GRB 090902B: ROTSE-III Detection of Optical Afterglow
- GRB 090902B: Swift/UVOT refined analysis
- GRB090902B: Swift XRT refined analysis
- GRB 090902B: Faulkes Telescope North observations
- GRB 090902B: GROND NIR Afterglow Observations
- GRB 090902B: Gemini-N absorption redshift
- GRB 090902B: Fermi LAT and GBM refined analysis.
- GRB 090902B: Enhanced Swift-XRT position
- GRB 090902B: Optical afterglow candidate
- GRB 090902B: Swift/XRT Afterglow Candidate
- GRB 090902B: Fermi LAT detection
- GRB 090902B: Fermi GBM detection of a bright burst