Listen Breakthrough Initiative

Open Data Archive

Breakthrough Listen data are stored in technical formats that require specialized software to analyze, and file sizes can be several gigabytes. Before downloading files from our public archive, we recommend you familiarize yourself with how the data are stored. A good place to start is with the educational materials provided by Berkeley SETI Research Center.

Access analysis results and description from The Breakthrough Listen Search for Advanced Life: 1.1-1.9 GHz observations of 692 Nearby Stars.

A beta interface with additional search options is also available at

Search Form

Sky coordinates:


Note about target names:
* targets ending in “_I2” have iodine absorption features across part of the spectrum (to determine precise radial velocities).
* targets ending in “_OFF” are “off source targets,” i.e. the telescope is aimed slightly away (typically less than 2 degrees Dec) from the intended target in order to get a baseline of the background.


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File Type
Md5sum Download
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