# Spectangular: Disentangling variable spectra

## TL;DR

Spectangular is a C++ GUI software for spectral disentangling that now handles variable spectra, allowing extraction of photometric information and addressing effects like telluric lines and line profile variability.

## Contribution

The paper introduces new capabilities in Spectangular for disentangling variable spectra, including flux ratio optimization and handling of telluric and line profile variability.

## Key findings

- Successful disentangling of spectra from an artificial eclipsing binary
- Implementation of flux ratio optimization for photometric insights
- Analysis of variability effects such as telluric lines and line profiles

## Abstract

Spectangular is a GUI based software package written in C++ designed for spectral disentangling on the wavelength scale. The code disentangles spectra of SB1 and SB2 systems and can now also be used also for spectra showing variability. In this work, effects of variability caused by telluric lines, line profile, and continuum flux are being investigated. Also shown is the disentangling on spectra from an artificial eclipsing binary. It is now possible to optimize on the flux ratios of each spectrum, making the disentangling a technique for extracting photometric information from spectroscopic observations usually provided by additional photometry. Furthermore, we make some comments about changes to the code since it was first published.