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.
Lucene Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"13 results found.
- GRB 100526A: Gemini/NIRI infrared afterglow candidate
- GRB 070306: possible emission-line redshift
- GRB 070306, optical observation
- VLA observation of GRB 070306
- GRB 070306: NOT observations
- GRB 070306 Swift/UVOT refined analysis
- GRB070306: confirmation of near infrared afterglow
- GRB 070306: ART-3 early optical and near infrared constraints
- GRB 070306: IR observations and candidate afterglow
- GRB 070306, Swift-BAT refined analysis
- GRB 070306: XRT Team Refined Analysis
- GRB 070306: Optical and IR observations with KANATA
- GRB 070306: Swift detection of a burst