Echelle Spectra

This page is for expanded discussion and brainstorming of functionality for Echelle spectra, as discussed in this issue.

Format

• List of 1DSpectra?
• 2-Dimensional array.

With the two-dimensional array, will there ever be a use case where all echelle orders are not guaranteed to be the same length (ie, a ragged array)?

Tools

• Combining orders
• Fitting and removing blaze function

(@wkerzendorf) "coadding, shifting, crossmatching of spectra is at the moment limited by our interpolation capacity. Interpolation is intricately linked with WCS and the main part missing to do a good general interpolation is a description of the pixel reference frame."

• More generally, is there any insurance that resample/rebinning routines properly Nyquist sample the spectra? How about convolution with an instrumental kernel.

Pipeline

• Extracting spectra from raw data

Algorithms

• Horne 86

Writing tools