The STIX imaging concept: model for data formation and image reconstruction methods for the Spectrometer/Telescope for Imaging X-rays on-board Solar Orbiter
- 1Universita di Genova, Dipartimento di Matematica, Genova, Italy (piana@dima.unige.it)
- 2Istituto Nazionale di Astrofisica, Osservatorio Astrofisico di Torino, Pino Torinese, Italy
- 3Western Kentucky University, Department of Physics and Astronomy, USA (paolo.massa@wku.edu)
- 4Politecnico di Torino, Dipartimento di Scienze Matematiche, Torino, Italy (emma.perracchione@polito.it)
- 5Fachhochschule Nordwestschweiz, Windisch, Switzerland (krucker@berkeley.edu)
The Spectrometer/Telescope for Imaging X-rays (STIX) on-board Solar Orbiter measures the X-ray photons emitted by thermal and non-thermal electrons via bremsstrahlung mechanisms. STIX modulates the incident radiation by means of 30 sub-collimators that provide information on the complex values of specific Fourier components of the flaring X-ray source. This talk will illustrate this data formation process and explain how this model can be exploited to formulate image reconstruction methods including constrained maximum entropy, multi-scale CLEAN, feature augmentation, and Particle Swarm Optimization for parametric imaging. These methods will be applied against several experimental STIX observations and the reliability of the reconstructed morphologies will be validated by comparison with EUV maps recorded by the Atmospheric Imaging Assembly (AIA) on-board the Solar Dynamics Observatory.
How to cite: Piana, M., Massa, P., Volpara, A., Massone, A. M., Benvenuto, F., Perracchione, E., Battaglia, A. F., Hurford, G., and Krucker, S.: The STIX imaging concept: model for data formation and image reconstruction methods for the Spectrometer/Telescope for Imaging X-rays on-board Solar Orbiter, EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-2688, https://doi.org/10.5194/egusphere-egu23-2688, 2023.
