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 150314A: GMG observation limit
- GRB 150314A: Further VLA observations
- GRB 150314A: VLA observations
- GRB 150314A: Early RAPTOR Detection
- GRB 150314A: NOT further optical observations
- Konus-Wind observation of GRB 150314A
- GRB 150314A: Swift-XRT refined Analysis
- GRB 150314A: KAIT Optical Observations
- GRB 150314A: P60 observations
- GRB 150314A: Redshift from OSIRIS/GTC
- GRB 150314A: NOT optical observations
- GRB 150314A Swift-BAT refined analysis
- GRB 150314A: Swift/UVOT Detection
- GRB 150314A: Fermi GBM observation
- GRB 150314A: MITSuME Akeno upper limits
- GRB 150314A: Skynet Yerkes-41 Observations of the Optical Afterglow
- GRB 150314A: Fermi-LAT detection
- GRB 150314A: Enhanced Swift-XRT position
- GRB 150314A: KAIT Optical Candidate
- GRB 150314A: Swift detection of a bright burst