Free Access

Fig. 2


Four typical light curves for variable stars (black dots K, gray dots H). The dashed lines represent two nearby nonvariable stars in K. From top to bottom, the individual panels show the following cases: a) Irregular variability, typical for most variable sources in this data set. b) Irregular variability with high amplitude and outburst. c) Candidate periodic star, representative of 13% of variables. d) Slow brightness change with possible periodic behavior, which can be found in 9% of variable sources.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.