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.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"13 results found.
- Radio observation of GRB 081029 with ATCA
- GRB 081029, SMARTS optical/IR afterglow observations
- GRB 081029: UVOT Detection of the Optical Afterglow
- GRB 081029: PROMPT Detections
- GRB 081029: Redshift Confirmation from Gemini-South
- GRB 081029: Swift-BAT refined analysis
- GRB081029: Swift XRT refined analysis
- GRB 081029: Enhanced Swift-XRT position
- GRB 081029: REM observations
- GRB 081029: UVES/VLT Absorption Redshift
- GRB 081029: GROND Detection of the Optical/NIR Afterglow
- GRB 081029: ROTSE-III Detection of Optical Counterpart
- GRB 081029: Swift detection of a burst