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"11 results found.
- GRB 060908: Detection of a possible host
- VLA observations of GRB 060908
- GRB 060908: redshift
- GRB 060908, Swift/XRT refined analysis
- GRB 060908: Swift/UVOT Observations
- GRB 060908: Danish/DFOSC optical observations
- GRB 060908, Swift-BAT refined analysis
- GRB 060908 - SDSS Pre-burst Observations
- GRB 060908: REM optical prompt observation
- GRB 060908: PROMPT Detection of a Bright Counterpart
- GRB 060908: Swift detection of a burst with a bright optical counterpart