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The Gemini Planet Imager (GPI) entered on-sky commissioning and had itsfirst-light at the Gemini South (GS) telescope in November 2013. GPI is anextreme adaptive optics (XAO), high-contrast imager and integral-fieldspectrograph dedicated to the direct detection of hot exo-planets down to aJupiter mass. The performance of the apodized pupil Lyot coronagraph dependscritically upon the residual wavefront error (design goal of 60 nm RMS with 5mas RMS tip/tilt), and therefore is most sensitive to vibration (internal orexternal) of Gemini's instrument suite. Excess vibration can be mitigated by avariety of methods such as passive or active dampening at the instrument ortelescope structure or Kalman filtering of specific frequencies with the AOcontrol loop. Understanding the sources, magnitudes and impact of vibration iskey to mitigation. This paper gives an overview of related investigations basedon instrument data (GPI AO module) as well as external data from accelerometersensors placed at different locations on the GS telescope structure. We reportthe status of related mitigation efforts, and present corresponding results.

On-sky vibration environment for the Gemini Planet Imager and mitigation effort