High-magnification Spitzer microlensing events observed during the 2018 season

We study a sample of high-magnification Spitzer microlensing events observed in 2018: OGLE-2018-BLG-1115, OGLE-2018-BLG-1074, MOA-2018-BLG-188, OGLE-2018-1254. We report light curve analyses and microlensing parallax constraints for the events. Both the ground-based and space-based data are used in the parallax analysis, and we examine their consistency. Finally, we fit for binary lenses and conduct sensitivity analyses on the sample in order to determine the probabilities of detecting binary signals with varying parameters. Additionally, we include a binary lens sensitivity analysis for the planetary microlensing event OGLE-2018-BLG-1185.