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 130822A: nearby galaxy redshifts
- GRB 130822A: optical upper limits
- GRB 130822A Swift-BAT Spectral lag analysis
- GRB 130822A: 5.8 GHz VLA upper limit
- GRB 130822A: Gemini Observations
- GRB 130822A: Swift-XRT refined Analysis
- GRB 130822A: WHT ACAM observations
- GRB 130822A: Swift/UVOT Upper Limits
- GRB 130822A: Enhanced Swift-XRT position
- GRB 130822A, Swift-BAT refined analysis
- GRB 130822A: Weihai optical upper limit
- GRB 130822A: Swift detection of a short burst