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 060714: Swift/UVOT Observations
- GRB 060714: NOT observations
- GRB 060714: OA fading and a possible host detection
- GRB 060714: Refined analysis of the Swift-BAT burst
- GRB 060714: REM infrared observations
- GRB 060714, SMARTS optical/IR afterglow observation
- GRB 060714 : Liverpool Telescope Observations
- GRB 060714: Swift XRT refined analysis
- GRB 060714: OA redshift
- Correction to Circular 5314: Circular refers to GRB 060714
- GRB060707 possible optical confirmation
- GRB 060714, optical observation
- GRB 060714: Swift detection of a burst with an UVOT optical afterglow