  The Matter-wave laser Interferometric Gravitation Antenna (MIGA) is an
underground instrument using cold-atom interferometry to perform precision
measurements of gravity gradients and strains. Following its installation at
the low noise underground laboratory LSBB in the South-East of France, it will
serve as a prototype for gravitational wave detectors with a horizontal
baseline of 150 meters. Three spatially separated cold-atom interferometers
will be driven by two common counter-propagating lasers to perform a
measurement of the gravity gradient along this baseline. This article presents
the cold-atom sources of MIGA, focusing on the design choices, the realization
of the systems, the performances and the integration within the MIGA
instrument.
