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"10 results found.
- GRB 101112A: Maidanak and CrAO optical observations
- GRB 101112A: OSN and BTA observations
- Possible detection of INTEGRAL burst GRB 101112A by the EVLA
- GRB 101112A: Fermi GBM detection
- GRB 101112A: optical observations
- Konus-Wind observation of GRB 101112A
- GRB 101112A - XRT source detection/analysis
- GRB 101112A: BOOTES-2/TELMA optical afterglow candidate
- GRB101112A: Liverpool Telescope Afterglow Candidate
- GRB 101112A: a long GRB detected by INTEGRAL