Robert Crittenden
= Robert Crittenden
{c}
<Robert Crittenden> co-authored an analysis of the <cross-correlation> between <cosmic microwave background> maps from <WMAP> and <cosmic X-ray background> maps from <HEAO 1>. Such a comparison tests whether angular variations measured in different radiation bands share a physical origin.
The paper examined possible foreground explanations for the correlation before interpreting it as evidence consistent with the <Integrated Sachs-Wolfe effect>. This is an example of testing a cosmological signal through independently measured maps and explicit alternative sources of correlation.<Investigating the origins of the CMB-XRB cross correlation by Stephen Boughn and Robert Crittenden>[Abstract: WMAP/HEAO1 cross-correlation and tests of foreground origins]{ref}
\Image[https://researchportal.port.ac.uk/files-asset/2377944/CrittendenRobert.png?f=jpg&w=160]
{title=Portrait of <Robert Crittenden>}
{description=External portrait linked from the institutional profile.}
{source=https://researchportal.port.ac.uk/en/persons/robert-crittenden/}
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