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Author

O. Limousin

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Preprint Sep 2026

First results from PADRE/MeDDEA: X-rays from a flare and its CME

The MeDDEA hard X-ray spectrometer onboard NASAs PADRE CubeSat operates four flight-spare detectors from the Solar Orbiter/STIX instrument. This paper aims to evaluate the accuracy of the MeDDEA calibration and to demonstrate that MeDDEA data are ready for scientific exploitation. Using the first joint observations bet...

M. Stiefel, S. Krucker, O. Limousin et al. · 0 citations
Preprint Aug 2026

Responses of the X-ray spectrometer/imager STIX onboard Solar Orbiter

Solar flares are explosive events that release X-rays from hot plasma and accelerated electrons. The STIX instrument on the Solar Orbiter provides imaging spectroscopy of solar X-ray emissions from 4 to 150 keV. To interpret the STIX data accurately, understanding the instrument's response is crucial. Given the complex...

Hualin Xiao, O. Limousin, E. Dickson et al. · 0 citations
Open access Sep 2026

In-Flight Self-Calibration of the STIX Grid Transmission

The Spectrometer/Telescope for Imaging X-rays (STIX) on board Solar Orbiter provides imaging information on the X-ray sources in solar flares by modulating the emitted radiation with pairs of grids made of stacked tungsten layers. Optical measurements of the grids were taken on the ground and utilized to derive an init...

P. Massa, A. Volpara, M. Stiefel et al. · 0 citations

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