SDSS image covering the Kepler field of view for V523 Lyr. The large red square indicates the typical aperture size (~10 × 10 pix², but often not rectangular in shape; see Kinemuchi et al. 2012) used for V523 Lyr in the standard Kepler pipeline to produce simple aperture photometry (SAP) light curves. The small red square indicates the Kepler pixel size (4′′) and is shown here centered on the V523 Lyr position. Typical Kepler PSFs (noted in the bright stars) are 4 pixels across. S2 and S3 indicate the two confounding variable stars near V523 Lyr, which occasionally fell into the V523 SAP aperture. See Appendix A for more details.