subtractAirglow

This software was developed to subtract geocoronal H I Lyα (1215.67 Å) and O I triplet (1302.17, 1304.86, and 1306.03 Å) from HST-COS G130M spectra. This is performed by simultaneously fitting the underlying stellar emission, attenuation from the interstellar medium (for Lyα only), and the contaminating geocoronal emission (airglow). A GUI was developed in python to perform the airglow subtraction and reconstruction of the underlying stellar emission for several observational modes using the COS G130M grating. While this software was developed in the context of the FUV emission from dwarf stars, the airglow templates can be manually placed on any G130M dataset and produce an airglow subtracted spectrum. The airglow templates for all four emission lines are also made available through this software for use outside of the GUI. See the readme file below for installation instructions.

Related Organizations

University of Colorado Boulder
United States
National Aeronautics and Space Administration
United States
Laboratory for Atmospheric and Space Physics
United States

Keywords

Dwarf Stars, Ultraviolet Spectroscopy, Main Sequence Stars, Stellar Activity, Hubble Space Telescope

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