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"11 results found.
- GRB060901: Candidate optical afterglow
- 060901: Swift UVOT followup observations
- GRB 060901: pseudo-z from spectral parameters of the prompt
- Konus-Wind observation of GRB 060901
- GRB 060901: SMARTS optical/IR observations update
- GRB 060901: Swift/XRT Refined Analysis
- GRB 060901: SMARTS optical/IR observations
- GRB 060901: Swift/XRT Position
- GRB 060901: further INTEGRAL results
- GRB 060901: Watcher observations
- GRB 060901: a long GRB detected by INTEGRAL