Lifting the M1M2 mirror surrogate

The LSST Primary/Tertiary Mirror (M1M3) cell assembly has been successfully integrated with the M1M3 mirror surrogate inside the LSST summit facility building. On October 10th, the mirror surrogate was lifted off the cell’s static supports with the system of hardpoints and pneumatic actuators that will support the weight of the mirror during telescope operations. The arrow in this photo shows how the mirror "floats" above the static supports.