Data from Light curves of young stars from K2 (K2YSO)

Over its mission lifetime, K2 observed hundreds of young stellar objects ("YSOs") at ages of less  than 10 million years (Myr). The team has created and analyzed custom light curves for K2 long cadence (roughly 30-minute sampling rate) targets in four different young  regions:  Upper Scorpius, the rho Ophiuchus cluster, Taurus, and NGC 6530, the Lagoon Nebula Cluster. The photometric pipeline consists of a mixture of circular aperture  photometry, psf photometry, and custom pixel masks for saturated stars. After removal of systematic trends related to pointing jitter, the best light curve was chosen for each target, maximizing photometric precision while avoiding blends with stellar neighbors. Outliers based on flux and image centroid position were flagged, with care to retain stellar flares and eclipses. The resulting light curves are provided here as a function of cluster membership as well as circumstellar disk status, as determined in the listed reference papers. While alternate light curve versions exist for some of the targets, the reduction procedures for these  products have been tuned to preserve all sources of astrophysical variability. Additionally, light curves for stars in the Lagoon superstamp region have never been released to the public  previously. The full set of time series will facilitate further high-precision studies of YSO photometric variability, as well as searches for substellar companions.