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"15 results found.
- GRB 060124: Keck optical spectrum
- GRB 050908: DEIMOS spectrum and further analysis
- RBO GRB 050908 observations
- WIRO observations in I of GRB 050908
- GRB050908: VLT R-band decay index.
- GRB 050908: Swift-BAT refined analysis
- GRB 050908: Optical observations
- Gemini Spectroscopy of GRB 050908
- GRB 050908: spectroscopic redshift
- GRB 050908: Prompt PROMPT Observations
- GRB 050908 : Swift XRT position
- GRB 050908: KAIT observations
- GRB 050908: P60 Confirmation of Optical Afterglow
- GRB 050908: Optical Observations
- GRB 050908: Swift detection of a burst