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 200219A: AstroSat CZTI detection
- GRB 200219A: ATCA 5/9 GHz radio observations
- Konus-Wind observation of GRB 200219A
- GRB 200219A: Chandra rapid ToO upper limit
- GRB 200219A: UVOT Upper Limits
- GRB 200219A: FRAM-Auger optical limit
- GRB 200219A, Swift-BAT refined analysis
- GRB 200219A: Swift-XRT refined Analysis correction
- GRB 200219A: Swift-XRT refined Analysis
- GRB 200219A: Enhanced Swift-XRT position
- GRB 200219A: Fermi GBM observation
- GRB 200219A: MASTER catalog automatic possible Host Galaxy candidate
- GRB 200219A: Swift detection of a short burst
- GRB 200219A: Fermi GBM Final Real-time Localization