# Cross-correlation analysis of CMB with foregrounds for residuals

Source: [Cross-correlation analysis of CMB with foregrounds for residuals](<https://www.sota2.com/research/paper/68fa334c1e209131ce88f1c1>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T19:59:40.083Z

Authors: Pavan K. Aluri, Pranati K. Rath

Published: 2012-02-13T10:00:34.000Z

## Abstract

In this paper, we try to probe whether a clean CMB map obtained from the raw satellite data using a cleaning procedure is sufficiently clean. Specifically we study if there are any foreground residuals still present in the cleaned data using a cross-correlation statistic. Residual contamination is expected to be present, primarily, in the galactic plane due to the high emission from our own galaxy. A foreground mask is applied conventionally to avoid biases in the estimated quantities of interest due to foreground leakage. Here, we map foreground residuals, if present, in the unmasked region i.e., outside a CMB analysis mask. Further locally extended foreground-contaminated regions, found eventually, are studied to understand them better. The few contaminated regions thus identified may be used to slightly extend the available masks to make them more stringent.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1202.2678>)

[PDF](<https://arxiv.org/pdf/1202.2678.pdf>)