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"13 results found.
- GRB080607: optical observation
- GRB 080607: AGILE-MCAL observation of the prompt emission
- Konus-Wind observation of GRB 080607
- GRB 080607: Swift-XRT refined analysis
- Swift/UVOT Observations of GRB080607
- GRB 080607 KAIT observations
- GRB 080607: Enhanced Swift-XRT position
- GRB 080607, Swift-BAT refined analysis
- GRB 080607 - PAIRITEL NIR detection
- GRB 080607: Keck/LRIS spectroscopy and redshift
- GRB 080607: Super-LOTIS early observations
- GRB 080607: Swift detection of a burst with optical afterglow
- GRB 080607: ROTSE-III Detection of Optical Counterpart