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.
- GRB 091029: Observations from Stardome Observatory
- GRB 091029, SMARTS optical/IR afterglow observations
- GRB091029: Swift/UVOT observations
- GRB 091029: Skynet/PROMPT Continued Observations of Fading
- GRB 091029: Swift XRT refined analysis
- GRB 091029: BOOTES-3 observations
- GRB 091029: Swift-BAT refined analysis
- GRB 091029: Enhanced Swift-XRT position
- GRB 091029: Gemini-South Redshift
- GRB 091029: Skynet/PROMPT Observations of Peak and Fading
- GRB 091029: GROND Detection of the Optical/NIR Afterglow
- GRB 091029: Swift detection of a burst with an optical counterpart