THE 3FHL CATALOG THE LARGEST CATALOG OF SOURCES DETECTED AT >10 GEV IS THE DEEPEST LOOK AT THE VERY HIGH ENERGY SKY AND WILL REMAIN UNRIVALED FOR YEARS TO COME. HOWEVER AT THE PRESENT DAY THE CATALOG SPECTROSCOPIC COMPLETENESS IS RATHER LOW (<50%
$75,000FY2021National Aeronautics and Space AdministrationNASA
Clemson University, Clemson SC