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.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"20 results found.
- GRB 080605: TLS 3rd Epoch - Source Confusion
- GRB080605: optical observation with the MITSuME-OAO telescope
- GRB 080605: optical observations
- Konus-Wind observation of GRB 080605
- GRB 080605: GROND 2nd epoch observations
- GRB 080605: TLS RRM Analysis, Plateau/Rebrightening, Red OT
- GRB 080605: Swift-UVOT refined analysis
- GRB 080605, Swift-BAT refined analysis
- GRB 080605, Swift-BAT refined analysis
- GRB 080605: Swift-XRT refined analysis
- GRB080605: observation by BOOTES
- GRB 080605: MASTER VWF 46 s AT observation
- GRB 080605: Enhanced Swift-XRT position
- GRB 080605: GROND detection of the optical afterglow candidate
- GRB080605: optical observations
- GRB 080605: VLT redshift
- GRB 080605: Liverpool Telescope optical afterglow candidate
- GRB 080605: Swift/UVOT Position of the Optical Afterglow
- GRB 080605: TLS RRM Afterglow
- GRB 080605: Swift detection of a burst with an optical afterglow