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 120311A, the review of the sky area in plate archives
- GRB 120311A: Optical follow-up
- GRB 120311A: C88 optical limits
- GRB 120311A: VLT/X-shooter observations
- GROND observations of GRB 120311A
- GRB 120311A: Swift-XRT refined Analysis
- GRB 120311A, Swift-BAT refined analysis
- GRB 120311A: Swift/UVOT Upper Limits
- GRB 120311A: CAHA 1.23m I-band early observations
- GRB 120311A: Enhanced Swift-XRT position
- GRB 120311A: Swift-XRT observations
- GRB 120311A: Liverpool Telescope optical candidate
- GRB 120311A: Swift detection of a burst