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"14 results found.
- GRB 140213A: Continued Skynet R-COP/PROMPT Observations of the Optical Afterglow
- GRB 140213A: Continued Skynet R-COP/PROMPT Detections of a Rebrightening Optical Afterglow
- Konus-Wind observation of GRB 140213A
- GRB 140213A: Swift-BAT refined analysis
- GRB 140213A: Swift/UVOT Observations
- GRB 140213A: Fermi GBM Detection
- GRB 140213A: Swift-XRT refined Analysis
- GRB140213A: VLT/X-shooter redshift
- GRB 140213A: Enhanced Swift-XRT position
- GRB 140213A: GROND Detection of the Optical/NIR Afterglow
- GRB 140213A: Skynet R-COP Detection of Optical Afterglow
- GRB 140213A: Swift-XRT observations
- GRB 140213A: Swift/UVOT Detection
- GRB 140213A: Swift detection of a burst