  I present timely spectroscopic follow-up of the newly discovered, quadruply
lensed quasar PSOJ0147 from the Pan-STARRS 1 survey. The newly acquired optical
spectra with GMOS onboard the Gemini north telescope allow us to pin down the
redshifts of both the foreground lensing galaxy and the background lensed
quasar to be z=0.572 and 2.341, providing firm basis for cosmography with
future high cadence photometric monitoring. I also inspect difference spectra
from two of the quasar images, revealing the microlensing effect. Long-term
spectroscopic follow-ups will shed lights on the structure of the AGN and its
environment.
