aesop is a data reduction toolkit for echelle spectra from the Astrophysical
Research Consortium (ARC) 3.5 m Telescope Echelle Spectrograph (ARCES) at Apache Point
Observatory (APO). You can view the source code and submit issues via GitHub.
In the interest of reproducing established results, we choose not to
re-implement the canonical IRAF reduction routine
and to limit
aesop’s functionality to processing after the aperture
extraction and initial wavelength solution.
The current version of
aesop is useful for the following tasks:
Removing radial velocities from echelle orders via cross-correlation with PHOENIX model spectra
Normalizing out the blaze-function in each echelle order given observations of a spectroscopic standard
Further normalizing each order for a flat continuum with robust least-squares
Concatenating the spectra in each order, and taking the mean between adjacent orders where they overlap, to produce a 1D spectrum from 3000-10000 Angstroms
aesop users will follow this procedure: