Using Planck PR4, nine low multipoles show anomalous anisotropy with a cumulative probability of about 0.3 percent, while quadrupole-octopole alignment is only marginal and no collective alignment is found.
Covariance of CMB anomalies
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Examining statistical isotropy of CMB low multipoles from Planck PR4 data
Using Planck PR4, nine low multipoles show anomalous anisotropy with a cumulative probability of about 0.3 percent, while quadrupole-octopole alignment is only marginal and no collective alignment is found.