... quasar

Based on observations obtained with VLT/ANTU at ESO-Paranal Observatory (program 67.A-0502) and with the Hubble Space Telescope, operated by NASA.

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...>)

$<e_1>\;=\; <\epsilon_i\times \cos(2\times \theta_i)>$ and $<e_2>\;=\;<\epsilon_i\times \sin(2\times \theta_i)>$, for each stick i.

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