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"12 results found.
- GRB 150323A: AAO optical observations
- GRB 150323A; Konkoly optical observations
- Konus-Wind observation of GRB 150323A
- GRB 150323A, Swift-BAT refined analysis
- GRB 150323A: KAIT Optical Observations
- GRB 150323A: Swift-XRT refined Analysis
- GRB150323A: Swift-UVOT detection of the afterglow
- GRB 150323A: Keck redshift
- GRB 150323A: Enhanced Swift-XRT position
- GRB 150323A: RATIR Optical Afterglow Observations
- GRB 150323A: P60 Optical Afterglow Candidate
- GRB 150323A: Swift detection of a burst