Histograms of the photons per image. The line curves show the cumulative percentage of images of the histogram of the same color. No fringes were detected for the data of the blue histogram (data between 21:30:00−21:33:00 UT of Deneb). The red histogram corresponds to the data where the fringes have been detected (21:08:30−21:10:00 UT + 21:28:00−21:30:00 UT). The large number of images at 3600 photons in the red histogram shows that Deneb slightly saturates the science camera. For the data of Deneb with fringes (in red), 45% of the images have more than 1800 photons (1800 is slightly below half of the maximum flux on Deneb that is over the saturation level), while only 25% of the data without fringes (blue) exceed this value.
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