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"14 results found.
- GRB 081126: afterglow photometry
- GRB 081126: Fermi GBM detection
- VLA Radio upper limit on GRB 081126
- GRB 081126: Swift observations continuing
- GRB 081126: GRT Optical Observation
- GRB 081126: Confirmation of the Optical Afterglow
- Konus-Wind observation of GRB 081126
- GRB 081126: Swift-XRT refined analysis
- GRB 081126: Swift/UVOT Observations
- GRB 081126: optical observations
- GRB 081126: Swift-BAT refined analysis
- GRB 081126: Enhanced Swift-XRT position
- GRB 081126: TAROT Calern observatory optical observations
- GRB 081126: Swift detection of a burst