Relation between Kepler magnitude Kp, and white noise. The black solid line represents the relation from Pande et al. (2018), the grey shaded area represents the white noise range corresponding to a variation of 0.4 mag. Our sample is represented by the grey and red dots, where the red dots constitute the sample used in the magnitude analysis, and is identified by the intersection of the horizontal lines with the grey shaded area. The horizontal grey dashed lines show the range of these points within 11.6 mag < Kp < 12 mag.