Sky brightness correlation coefficients for the 16 detectors. Green triangles: J, red circles: NB118, black crosses: Ks. The x-axes show the correlation coefficient with the ambient temperature, while the y-axis shows the correlation coefficient with the sky brightness in the Y band in the given detector. The correlation coefficients on the x-axes have been multiplied by minus one, since they would otherwise be negative due to the the sky brightness being in mag/arcsec2. Panel a) shows the Spearman rank order correlation coefficient rS while panel b) shows the linear Pearson correlation coefficient rP. The individual NB118 points are labelled with the detector number.
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