Chiang et al. 2003
Chiang, L.-Y., P.D. Naselsky, O.V. Verkhodanov, and M.J. Way, 2003: Non-Gaussianity of the derived maps from the first-year Wilkinson Microwave Anisotropy Probe data. Astrophy. J., 590, L65-L68, doi:10.1086/376822.
We present non-Gaussianity testing on derived maps from the recently released first-year Wilkinson Microwave Anisotropy Probe data by Tegmark, de Oliveria-Costa, & Hamilton. Our test is based on a phase-mapping technique that has the advantage of testing non-Gaussianity at separate multipole bands. We show that their foreground-cleaned map is against the random-phase hypothesis at all four multipole bands centered around l = 150, 290, 400, and 500. Their Wiener-filtered map, on the other hand, is Gaussian for l < 250 and marginally Gaussian for 224 < l < 350. However, we see the evidence of non-Gaussianity for l > 350 as we detect certain degrees of phase coupling, hence against the random-phase hypothesis. Our phase-mapping technique is particularly useful for testing the accuracy of component separation methods.
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Chiang, L.-Y., Naselsky, P.D., Verkhodanov, O.V., and Way, M.J.: Non-Gaussianity of the derived maps from the first-year Wilkinson Microwave Anisotropy Probe data, Astrophy. J., 590, L65-L68, doi:10.1086/376822, 2003.
Chiang, L.-Y., P.D. Naselsky, O.V. Verkhodanov, and M.J. Way (2003), Non-Gaussianity of the derived maps from the first-year Wilkinson Microwave Anisotropy Probe data, Astrophy. J., 590, L65-L68, doi:10.1086/376822.
Chiang, L.-Y., P.D. Naselsky, O.V. Verkhodanov, and M.J. Way, 2003: Non-Gaussianity of the derived maps from the first-year Wilkinson Microwave Anisotropy Probe data. Astrophy. J., 590, L65-L68, doi:10.1086/376822.
Chiang, L.-Y., Naselsky, P.D., Verkhodanov, O.V., & Way, M.J. 2003, Astrophy. J., 590, L65, doi:10.1086/376822.
Chiang L-Y, Naselsky PD, Verkhodanov OV, Way MJ. Non-Gaussianity of the derived maps from the first-year Wilkinson Microwave Anisotropy Probe data, Astrophy J 2003;590:L65-L68. doi:10.1086/376822.
L.-Y. Chiang, P.D. Naselsky, O.V. Verkhodanov, M.J. Way, Astrophy. J. 590, L65-L68, doi:10.1086/376822 (2003).
