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Microlensing planets occurring on faint source stars can escape detection dueto their weak signals. Occasionally, detections of such planets are notreported due to the difficulty of extracting high-profile scientific issues onthe detected planets. For the solid demographic census of microlensingplanetary systems based on a complete sample, we investigate the microlensingdata obtained in the 2016 and 2017 seasons to search for planetary signals infaint-source lensing events. From this investigation, we find four unpublishedmicrolensing planets including KMT-2016-BLG-2364Lb, KMT-2016-BLG-2397Lb,OGLE-2017-BLG-0604Lb, and OGLE-2017-BLG-1375Lb. We analyze the observed lensinglight curves and determine their lensing parameters. From Bayesian analysesconducted with the constraints from the measured parameters, it is found thatthe masses of the hosts and planets are in the ranges $0.50\lesssim M_{\rmhost}/M_\odot\lesssim 0.85$ and $0.5 \lesssim M_{\rm p}/M_{\rm J}\lesssim13.2$, respectively, indicating that all planets are giant planets around hoststars with subsolar masses. The lenses are located in the distance range of$3.8 \lesssim \dl/{\rm kpc}\lesssim 6.4$. It is found that the lenses ofOGLE-2017-BLG-0604 and OGLE-2017-BLG-1375 are likely to be in the Galacticdisk.

Four Microlensing Planets with Faint-source Stars Identified in the 2016 and 2017 Season Data