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"15 results found.
- GRB 110407A: Swift-XRT refined Analysis
- GRB 110407A:VLF observations on 20.27kHz
- GRB 110407A: SMARTS optical limit
- GRB 110407A: MASTER optical observations
- GRB110407A: UVOT Upper Limits
- GRB 110407A: GROND Detection of the Optical Afterglow
- GRB 110407A: MITSuME Okayama and Ishigakijima Optical upper limits
- GRB 110407A: NOT optical observations
- GRB 110407A: Enhanced Swift-XRT position
- GRB 110407A: Swift-BAT refined analysis
- GRB 110407A : Lulin optical afterglow detection
- GRB 110407A : Xinglong TNT upper limit
- GRB 110407A: MASTER early optical observations
- GRB 110407A: Prompt enhanced Swift-XRT position
- GRB 110407A: Swift detection of a burst