= Dale J. Fixsen
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<Dale J. Fixsen> studies precision measurements of the <cosmic microwave background>. He led an analysis of <FIRAS> data from <COBE> that compared the sky signal with a precise <blackbody spectrum>, constraining departures from that spectral shape.<The Cosmic Microwave Background Spectrum from the Full COBE FIRAS Data Set by Dale J. Fixsen and others>[Abstract: differential blackbody comparison and limits on spectral deviations]{ref}
His 2009 study independently recalibrated <FIRAS> using <WMAP> and combined published measurements of the background <temperature>. It distinguishes the temperature from that recalibration from the value obtained by combining the literature: $2.72548\pm0.00057\,\mathrm K$. The distinction makes the origin of an extremely precise quoted number traceable.<The Temperature of the Cosmic Microwave Background by Dale J. Fixsen>[Abstract: independent recalibration and literature-combined temperature]{ref}
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