Data reduction script for the GHOst Ultra-faint Legacy Survey
Date
2025
Authors
Cornejo Gonzalez, Triana
Journal Title
Journal ISSN
Volume Title
Publisher
University Of Victoria
Abstract
The Ghost Ultra-faint Legacy Survey (GHOULS) is an ongoing survey of the stellar members of Ultra-Faint Dwarf galaxies in the southern hemisphere. Over the next couple of years, GHOULS will record the spectra of these stars with the Gemini High-resolution Optical Spectrograph (GHOST) and create a complete and homogenous data set of their chemical abundances.
Because of the high number of proposed targets, the UVic-based co-investigators of GHOULS required a homogeneous way to perform the spectrum corrections before feeding them to the chemical analysis routines.
FIXER_1 was written to normalize, calculate radial velocities and perform radial-velocity corrections to the 1D output spectra of the Gemini data reduction pipeline designed for observations from GHOST (DRAGONS). This involved modifications to various separate, previously written normalization and radial velocity correction routines which were integrated into a single Python notebook that requires minimal user input.
FIXER_1 provides the chemical analyses group with a routine compatible with the DRAGONS pipeline outputs that reduces spectra in a standardized manner, which allows easy comparison between preliminary chemical abundances of the stars in the survey.
Description
Keywords
astronomy, ultra-faint, galaxy, spectra