This entry reports the birefringence measurement of the AZTEC sample with no rotation,

Note that a quite strong earthquake happend right after the measurement with input polarization = 0 deg...

Note that in that case the input polarization angle of 0 deg is made with hwp angle = 346 deg..

While the mean value of the polarization angle measurement seems reasonable, there is now a strange 'peak' on the top right of the sample...

We'll go to PCI to check if the sample is fine.