REDUCTION OF HAMILTON ECHELLE DATA AT LICK OBSERVATORY

Abstract

ABSTRACT The reduction package used to reduce CCD-echelle data from the Hamilton spectrograph at Lick Observatory is described. The input data required for the reduction package are addressed, and the steps taken to prepare for reducing an observations are discussed. How the echelle orders are located and how the spectra are extracted from the echelle image are described, and the corrections for interference fringes which become significant at red wavelengths are examined. The wavelength calibration is addressed, and flux calibration and merging of individual orders are covered. Examples of data reduced using these procedures are presented.