The author used both methods, eye measurements, as well as digitized light curves from scanned plates. The paper has a graph of the latter. It's actually easy t

The author used both methods, eye measurements, as well as digitized light curves from scanned plates. The paper has a graph of the latter. It's actually easy to replicate, the data is online. http://arxiv.org/abs/1601.03256 http://arxiv.org/abs/1601.03256 http://dasch.rc.fas.harvard.edu/lightcurve.php http://dasch.rc.fas.harvard.edu/lightcurve.php (You can download this star under the name "J20061546+4427248"; the KIC identifier doesn't seem to work).