Extra-heliospheric background near the Lyman-alpha wavelength as revealed by cross-analysis of SOHO/SWAN maps, IUE observations, and WawHelioGlow modeling results

Marek Strumik, Maciej A. Bzowski, Marzena A. Kubiak and Izabela Kowalska-Leszczyńska, Space Research Centre Polish Academy of Sciences, Warsaw, Poland