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 140516A: further Swift-XRT analysis
- GRB 140516A: RATIR Optical and NIR Observations
- GRB 140516A: Subaru NIR imaging observations
- GRB 140516A: 6 GHz upper limit
- GRB 140516A: Gemini-North limit on an optical afterglow
- GRB 140516A: Swift/UVOT Upper Limits
- GRB 140516A: Swift-BAT refined analysis
- GRB 140516A: Swift-XRT refined Analysis
- GRB 140516A: NOT optical observations
- GRB 140516A: Enhanced Swift-XRT position
- GRB 140516A: MASTER early optical observations
- GRB 140516A: ISON-Kislovodsk optical observations
- GRB 140516A: TNG optical observations
- GRB 140516A: Swift detection of a short burst