Population synthesis of RR Lyrae stars in the original $Kepler$ and $K2$   Fields of View
  It is interesting to ask what fraction of the total available RR Lyrae (RRL) sample that falls in the $Kepler$ and $K2$ Fields of View (FoV) is known or discovered. In order assess the completeness of our sample we compared the known RRL sample in the $Kepler$ and $K2$ fields with synthetic Galactic models. The Catalina Sky Survey RRL sample was used to calibrate our method. We found that a large number of faint RRL stars is missing from $Kepler$ and $K2$ fields. 
Ott\'o Hanyecz, R\'obert Szab\'o
astro-ph.SR