Identifying 3FHL. V. CTIO-COSMOS spectra

As a follow-up to the optical spectroscopic campaign aimed at achieving completeness in the Third Catalog of Hard Fermi-LAT Sources (3FHL), we present here the results of a...作为旨在实现第三批费米-LAT硬伽马射线源表（Third Catalog of Hard Fermi-LAT Sources，3FHL）完备性的光学光谱巡天项目的后续工作，我们在此展示一项……的研究结果。