%AZhao, Lily%AHogg, David%ABedell, Megan%AFischer, Debra%BJournal Name: The Astronomical Journal; Journal Volume: 161; Journal Issue: 2 %D2021%I %JJournal Name: The Astronomical Journal; Journal Volume: 161; Journal Issue: 2 %K %MOSTI ID: 10346431 %PMedium: X %TExcalibur : A Nonparametric, Hierarchical Wavelength Calibration Method for a Precision Spectrograph %X %0Journal Article