HelioSpectrotron 5000: An interactive multi-resolution solar spectral atlas

Abstract

HelioSpectrotron 5000 (HS5000) is an interactive, multi-resolution solar spectral atlas designed to facilitate direct comparison between high-resolution reference spectra and observations obtained with a wide range of ground-based instruments. Based on the Hamburg FTS atlas, the HS5000 provides both absolute intensity and continuum-normalized spectra at arbitrary spectral ranges and resolutions, as well as curated line identifications and optional telluric contamination. This framework enables rapid wavelength calibration, line identification, and context image generation.

Figures (3)

• Figure 1: Example Sol’Ex spectrum (red) taken from VaradiNagy2025 compared to the FTS atlas (gray) and a version of the same atlas convolved to the spectral resolution of the Sol’Ex (black), illustrating how spectral alignment becomes non-trivial when the spectral resolutions differ strongly.
• Figure 2: Overview of HS5000 showing the full user interface, tuned to the same spectral range as Fig. \ref{['fig:resolution']}. The native-resolution atlas spectrum (gray) is compared to a degraded spectrum at $R \approx 20{,}000$ (black). Line labels are enabled, and the associated 2D spectrum panel is shown for navigation. Tellurics are turned off.
• Figure 3: A full resolution spectrum around the H$\alpha$ line with tellurics set to approximate observations at sea level.