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.
- Optical Observation: GRB 071010
- Optical observations: GRB 071010A
- Konus-Wind observation of GRB 071010B
- GRB 071010: Swift-XRT observation
- GRB 071010, Swift-BAT refined analysis
- GRB 071010 REM NIR observations
- GRB 071010: Keck/LRIS Spectroscopy
- GRB 071010: TAROT La Silla observatory photometry of the afterglow
- GRB 071010: Rapid PROMPT Detections
- GRB 071010: Keck Observations of the Afterglow
- GRB 071010: TAROT La Silla observatory detection of the afterglow
- GRB 071010: Swift detection of a burst