Tests of AMiBA Data Integrity

Abstract

We describe methods used to validate data from the Y.T. Lee Array for Microwave Background Anisotropy (AMiBA), an interferometric array designed to measure the Sunyaev-Zel'dovich effect and the anisotropy of the Cosmic Microwave Background (CMB). We perform several statistical tests on data from pointed galaxy cluster observations taken in 2007 and noise data from long-term blank sky observations and measurements with the feeds covered by the absorbers. We apply power spectrum analysis, cross power spectrum analysis among different outputs with different time lags in our analog correlator, and sample variance law tests to noise data. We find that (1) there is no time variation of electronic offsets on the time scale of our two-patch observations (~10 minutes); (2) noise is correlated by less than 10% between different lags; and (3) the variance of noise scales with the inverse of time. To test the Gaussianity of the data, we apply Kolmogorov-Smirnov (K-S) tests to cluster data, and find that a 5% significance level efficiently detects data sets with known hardware problems without rejecting an excess of acceptable data. We also calculate third- and fourth-order moments and cumulants for the noise residual visibilities and find that about 95% of our data are within the 99% confidence regions of Gaussianity.

15 pages, 5 figures, accepted for publication in ApJ

References in corpus (11)

• Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Beam Profiles, Data Processing, Radiometer Characterization and Systematic Error Limits
• Mass and Hot Baryons in Massive Galaxy Clusters from Subaru Weak Lensing and AMiBA SZE Observations
• Observations of High-Redshift X-Ray Selected Clusters with the Sunyaev-Zel'dovich Array
• MAXIPOL: Data Analysis and Results
• The AMiBA Hexapod Telescope Mount
• The Yuan-Tseh Lee Array for Microwave Background Anisotropy
• AMiBA: Broadband Heterodyne CMB Interferometry
• Estimating the bispectrum of the Very Small Array data
• AMiBA: System Performance
• Non-Gaussianity in the Very Small Array CMB maps with Smooth-Goodness-of-fit tests
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Cited by in corpus (13)

• Mass and Hot Baryons in Massive Galaxy Clusters from Subaru Weak Lensing and AMiBA SZE Observations
• The AMiBA Hexapod Telescope Mount
• The Yuan-Tseh Lee Array for Microwave Background Anisotropy
• AMiBA: Broadband Heterodyne CMB Interferometry
• AMiBA Wideband Analog Correlator
• AMiBA: System Performance
• AMiBA: scaling relations between the integrated Compton-y and X-ray derived temperature, mass, and luminosity
• Constraining Intra-cluster Gas Models with AMiBA13
• AMiBA: Sunyaev-Zel'dovich effect derived properties and scaling relations of massive galaxy clusters
• Contamination of the Central Sunyaev--Zel'dovich Decrements in AMiBA Galaxy Cluster Observations
• 1.2 Meter Shielded Cassegrain Antenna for Close-Packed Radio Interferometer
• Platform Deformation Phase Correction for the AMiBA-13 Co-planar Interferometer
• AMiBA: Cluster Sunyaev-Zel'dovich Effect Observations with the Expanded 13-Element Array