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"20 results found.
- GRB 080330: Swift-XRT refined position retraction
- GRB 080330 optical observations
- GRB 080330: RAPTOR detection of prompt optical flash
- GRB080330: Improved Swift XRT Position
- GRB 080330: Prompt PROMPT Observations
- GRB080330: optical observations
- GRB080330: optical observations
- GRB080330: Swift XRT refined analysis
- GRB 080330: REM optical observations
- GRB 080330, SMARTS optical/IR afterglow observations
- GRB 080330 Swift-UVOT refined analysis
- GRB 080330, Swift-BAT refined analysis
- GRB 080330: Redshift Confirmation from Hobby-Eberly Telescope Spectroscopy
- GRB 080330: GROND Observations
- GRB 080330: NOT redshift
- GRB 080330: TAROT Calern observatory optical observations
- GRB 080330: error in reported XRT position
- GRB 080330: Liverpool Telescope Optical observations
- GRB 080330: Swift detection of a burst with an optical counterpart
- GRB 080330: TAROT Calern observatory optical detection