| Name: Unnimaya K C |
| Affiliation: U R Rao Satellite Centre, Bangalore |
| Conference ID: ASI2026_185 |
| Title: Solar energetic particle contamination catalog development for HEL1OS aboard Aditya L1 |
| Abstract Type: Oral |
| Abstract Category: Sun, Solar System, Exoplanets, and Astrobiology |
| Author(s) and Co-Author(s) with Affiliation: Unnimaya K C(Space Astronomy Group, ISITE Campus, U R Rao Satellite Centre, ISRO, Banglore, 560037, India), Manju Sudhakar(Space Astronomy Group, ISITE Campus, U R Rao Satellite Centre, ISRO, Banglore, 560037, India) |
| Abstract: The High Energy L1 Orbiting X-ray Spectrometer (HEL1OS) onboard Aditya-L1 is optimized for high-resolution measurements of solar flare X-ray emission in the 10–150 keV energy range using Cadmium Telluride (CdTe) and Cadmium Zinc Telluride (CZT) detectors. In addition to solar photons, HEL1OS is inherently sensitive to energetic charged particles present in the interplanetary environment. During Solar Energetic Particle (SEP) events, accelerated protons and electrons can reach the L1 point and deposit energy in the detectors, leading to significant non-photonic background enhancements. Such particle-induced contamination poses a major challenge for the accurate interpretation of flare X-ray measurements.
In this work, we present a comprehensive and systematic framework for identifying and characterizing particle contamination in HEL1OS light curve data. The methodology integrates data preprocessing, background estimation, and trend-based diagnostics to robustly flag time intervals dominated by particle contributions.
Using this approach, we develop a particle contamination catalog for HEL1OS, providing a reliable means to identify and exclude affected intervals from scientific analyses. The identified particle-contaminated events are associated with their corresponding source solar events, and the results of the algorithm and detailed analysis are presented in this work. This catalog serves as a critical resource for improving the quality of HEL1OS X-ray datasets. The proposed framework significantly enhances the scientific utility of HEL1OS by mitigating particle background effects and strengthening its contribution to studies of solar flare energetics and space
weather phenomena. |
