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"3311 results found.
- Konus-Wind observation of GRB 050525
- Konus-Wind observation of GRB 050401
- Konus-Wind observation of GRB 050326
- Triangulation of Short Hard GRB050112 (large error box)
- XRF040701: Second-Epoch Chandra Observations
- GRB 040329: hard burst detected by Konus-Wind and Helicon - Coronas-F
- GRB 021203: A Normal GRB viewed far off axis?
- GRB030329a: detection by Konus-Wind
- GRB030329b: detection by Konus-Wind and Helicon-CoronasF
- The X-ray Flash 011030 ('GRB 011030')
- BATSE observations of FXT/GRB 000416 = 1SAXJ1715.0-7134