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 090205: Zadko Telescope late-time observations
- VLA radio upper limit on GRB 090205
- GRB 090205: VLT optical decay
- GRB 090205: Swift/UVOT Upper Limits
- GRB 090205: VLT refined redshift
- GRB 090205: Swift-XRT refined analysis
- GRB 090205: Swift burst of interest
- GRB 090205: VLT spectroscopic redshift
- GRB 090205: GROND observations and photometric redshift estimate
- GRB 090205: VLT candidate afterglow
- GRB 090205: Swift-BAT refined analysis
- GRB 090205: Enhanced Swift-XRT position
- GRB 090205: Swift detection of a burst