Table 1 – Flare contamination probabilities for Ariel targets with derived flare activity indicators (G. Galletta et al. 2026)

This table is presented in G. Galletta et al. (2026), “Characterizing Stellar Flares in Ariel Targets: Activity Analysis and Transit Contamination”. It lists the subset of Ariel target planets for which a flare contamination probability could be computed from well-constrained two-segment flare frequency distributions. For each system we report the stellar bolometric luminosity (with uncertainty), the high-energy FFD slope, and the normalized flare activity index GF.01, together with the probability of observing at least one flare during a typical transit visit. Probabilities are provided for two energy thresholds, corresponding to flares releasing 100% and 10% of the stellar bolometric luminosity, respectively. Only planets with at least one defined probability are included. These quantities enable a direct assessment of the expected flare impact on Ariel transit spectroscopy and allow identification of high-risk targets, particularly among low-luminosity, flare-active stars.