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"13 results found.
- GRB 190129B: Insight-HXMT/HE detection
- Improved IPN error box for GRB 190129B
- GRB 190129B: GOTO optical observations
- GRB 190129B: DDOTI Detection of the Possible Afterglow and Suggestion of Fading
- GRB 190129B: Swift/UVOT Upper Limits
- GRB 190129B: ePESSTO NTT optical observations
- GRB 190129B: AstroSat CZTI detection
- GRB 190129B: MASTER Global Robotic Net optical observation
- GRB 190129B: GROND possible host candidate
- GRB 190129B: Swift-XRT candidate afterglow detection
- GRB 190129B: Tiled Swift observations
- Konus-Wind observation of extremely bright GRB 190129B
- IPN Triangulation of GRB 190129B (long/extremely bright)