Figure 4: Measured count rate spectra of tracking (dots) and background (solid line) data for each of the sunset datasets (A–J). | Nature Physics

Figure 4: Measured count rate spectra of tracking (dots) and background (solid line) data for each of the sunset datasets (A–J).

From: New CAST limit on the axion–photon interaction

Figure 4

The error bars correspond to the 1-σ statistical fluctuation of each bin content following Poissonian statistics. The error bars of the background data are omitted for the sake of clarity, although they are typically ∼3 times smaller than the tracking data error bars.

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