000007690 001__ 7690
000007690 005__ 20260105141806.0
000007690 037__ $$aPOSTER-2026-0008
000007690 100__ $$aShestov, Sergei
000007690 245__ $$aIn-flight cross-calibration of HRI/EUI and AIA/SDO
000007690 260__ $$c2025
000007690 269__ $$c2025-02-17
000007690 520__ $$aThe extreme ultraviolet High-Resolution Imager (HRI) of the EUI telescope onboard Solar Orbiter observes the solar corona in a ~5A passband near 174A with unprecedented high spatial resolution. We perform radiometric cross-calibration of the HRI and the EUV channels of the Atmospheric Imaging Assembly (AIA) telescope of the SDO in order to allow further mutual analysis of the observational data. We apply differential emission measure analysis using quasi-simultaneous images in 7 spectral channels – HRI and 6 AIA – and compare the real and the simulated images on the per-pixel basis across the mutual field-of-view. The comparison suggests that the real HRI images have a 60-80% larger signal than predicted by the DEM analysis. While the DEM analysis is known to be error-prone, a good re-production of EUI images justifies the approach. The observed difference in real/simulated signal suggests either AIA absolute calibration or EUI absolute calibration is off. We also found that adding the HRI signal to the AIA-based DEM inversion procedure brings information about moderate ~1MK plasma. We discuss how mutual observations can be used to better understand the physics of individual events or structures.
000007690 594__ $$aSTCE
000007690 6531_ $$aEUI
000007690 6531_ $$aSolar Orbiter
000007690 6531_ $$acalibration
000007690 6531_ $$aSDO
000007690 6531_ $$aAIA
000007690 700__ $$aZhukov, Andrei N.
000007690 700__ $$aAuchere, Frederic
000007690 700__ $$aBerghmans, David
000007690 700__ $$aLoicq, Jerome
000007690 773__ $$tSDO Workshop
000007690 8560_ $$fdavid.berghmans@ksb-orb.be
000007690 85642 $$ahttps://sdo2025.sdo-workshops.org/Abstract_Book_for_SDO_2025_V4.pdf
000007690 85642 $$ahttps://scholar.google.com/citations?view_op=view_citation&hl=en&user=4-Jv_RoAAAAJ&cstart=20&pagesize=80&sortby=pubdate&citation_for_view=4-Jv_RoAAAAJ:RuPIJ_LgqDgC
000007690 980__ $$aCPOSTER