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"16 results found.
- GRB 080212: Mount Abu NIR observations
- Swift-XRT and UVOT observations of the IPN burst GRB 080211
- GRB 080212: VLT optical rapid decay
- GRB 080212: REM refined analysis
- VLA radio upper limit on GRB 080212
- Swift/UVOT refined analysis of GRB080212
- GRB 080212, Swift-BAT refined analysis
- GRB080212: Optical afterglow candidate observed by MITSuME Telescope
- GRB 080212: Gemini-South optical observations
- GRB 080212: GROND detects afterglow
- GRB 080212: REM NIR afterglow?
- GRB 080212: optical observations
- GRB 080212: Enhanced Swift-XRT position
- GRB 080212: Swift-XRT Team refined analysis
- GRB 080212: Swift detection of a burst
- GRB 080212: DSS/2MASS Galaxy at XRT position