Tootfinder

Automated Spectroscopic Wavelength Calibration using Dynamic Time Warping
James R. A. Davenport, Francisca Chabour Barra, K. Azalee Bostroem, Sarah Tuttle, Josue Torres, Jessica Birky, Anastasios Tzanidakis, Kal Kadlec, Yuankun Wang, Suzanne L. Hawley, Trevor Z. Dorn-Wallenstein, William Ketzeback, Julene Elias, Abdullah Korra, Anna Panova, Kathryn Devine, Kevin R. Covey

Automated Spectroscopic Wavelength Calibration using Dynamic Time Warping
Here we present an automated method for obtaining wavelength calibrations for one-dimensional spectra, using Dynamic Time Warping (DTW). DTW is a flexible and well-understood algorithm for pattern matching, which has not been widely used in astronomy data analysis. Employing a calibrated template spectrum as a reference, DTW can recover non-linear and even discontinuous dispersion solutions without an initial guess. The algorithm is robust against differing spectral resolution between the templ…