Light Curves of Young Stars from TESS (TESS-YSO)

Throughout its mission, the Transiting Exoplanet Survey Satellite (TESS) has observed thousands of young stellar objects (YSOs) at ages of less than ~10 million years (Myr). Observed at sampling rates of 30 minutes or less, these targets are scattered across the sky and associated with various star forming regions. The team has created and analyzed custom light curves from TESS Full Frame Images, with a focus on preserving the variability associated with YSOs. The photometric pipeline consists of a mixture of circular aperture photometry and custom pixel masks, from which the best light curve was chosen for each target. Care was taken to maximize photometric precision and minimize systematic effects, while avoiding blends with stellar neighbors.

The resulting light curves are provided here as a function of stellar type, circumstellar disk status, and host cluster (if known), as determined in the listed reference papers. In the first release, the HLSP team provides light curves for young intermediate mass stars with spectral types G through O. The team refers to these as "Herbig Ae/Be stars" since the majority are A and B type with emission lines due to accretion from a circumstellar disk. While alternate light curve versions exist for some of the targets, the reduction procedures for these products have been tuned to retain all sources of astrophysical variability.