Rubin Observatory Simonyi Survey Telescope integrated mount performance

The Vera C. Rubin Observatory is an integrated survey system, currently under construction in Chile, to accomplish a 10-year optical survey of the southern sky. The 8.4m Simonyi Survey Telescope mount is nearing completion and undergoing final verification and performance testing. Since the system is optimized for etendue, the telescope mount slewing performance is particularly critical to overall survey efficiency. For example, this high performance mount is capable of slewing 3.5 degrees in a 3-second period. An overview of the mount subsystems is presented and selected dynamic performance results from on-site testing are described.