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 201017A iTelescope observation
- GRB 201017A: SAO RAS optical observations
- GRB 201017A: GROWTH-India optical upper limit
- GRB 201017A: MITSuME Akeno optical upper limits
- GRB 201017A: Swift-BAT refined analysis
- GRB 201017A: Assy and Mondy optical observations, possible afterglow detection
- GRB 201017A: Swift-XRT refined Analysis
- GRB 201017A: Fermi GBM detection
- GRB 201017A: Xinglong TNT upper limit
- GRB 201017A: Enhanced Swift-XRT position
- Swift GRB 201017A: Global MASTER-Net observations report
- GRB 201017A: Swift detection of a burst
- GRB 201017A: Fermi GBM Final Real-time Localization