Analysis of RHESSI flares using a radio astronomical technique

E. J. Schmahl; R. L. Pernak; G. J. Hurford; J. Lee; S. Bong

doi:10.1007/s11207-007-0263-1

Analysis of RHESSI flares using a radio astronomical technique

E. J. Schmahl, R. L. Pernak, G. J. Hurford, J. Lee, S. Bong

Ctr for Solar-Terrestrial Research

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46 Scopus citations

Abstract

We have used Ramaty High Energy Solar Spectroscopic Imager (RHESSI) modulation profiles in the 25∈-∈300 keV range to construct high-fidelity visibilities of 25 flares having at least two components. These hard X-ray visibilities, which are mathematically identical to the visibilities of radio imaging, were input to software developed for mapping solar flares in the microwave domain using the Maximum Entropy Method (MEM). We compared and contrasted the MEM maps with Clean and Pixon maps made with RHESSI software. In particular, we assessed the reliability of the maps and their morphologies for future investigations of the symmetry of bipolar electron beaming in the sample set.

Original language	English (US)
Pages (from-to)	241-252
Number of pages	12
Journal	Solar Physics
Volume	240
Issue number	2
DOIs	https://doi.org/10.1007/s11207-007-0263-1
State	Published - Feb 2007

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Image processing
Instruments
Numerical methods
Sun: X-rays
Sun: flares

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10.1007/s11207-007-0263-1

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abstract = "We have used Ramaty High Energy Solar Spectroscopic Imager (RHESSI) modulation profiles in the 25∈-∈300 keV range to construct high-fidelity visibilities of 25 flares having at least two components. These hard X-ray visibilities, which are mathematically identical to the visibilities of radio imaging, were input to software developed for mapping solar flares in the microwave domain using the Maximum Entropy Method (MEM). We compared and contrasted the MEM maps with Clean and Pixon maps made with RHESSI software. In particular, we assessed the reliability of the maps and their morphologies for future investigations of the symmetry of bipolar electron beaming in the sample set.",

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AU - Schmahl, E. J.

AU - Pernak, R. L.

AU - Hurford, G. J.

AU - Lee, J.

AU - Bong, S.

PY - 2007/2

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AB - We have used Ramaty High Energy Solar Spectroscopic Imager (RHESSI) modulation profiles in the 25∈-∈300 keV range to construct high-fidelity visibilities of 25 flares having at least two components. These hard X-ray visibilities, which are mathematically identical to the visibilities of radio imaging, were input to software developed for mapping solar flares in the microwave domain using the Maximum Entropy Method (MEM). We compared and contrasted the MEM maps with Clean and Pixon maps made with RHESSI software. In particular, we assessed the reliability of the maps and their morphologies for future investigations of the symmetry of bipolar electron beaming in the sample set.

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KW - Numerical methods

KW - Sun: X-rays

KW - Sun: flares

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Analysis of RHESSI flares using a radio astronomical technique

Abstract

All Science Journal Classification (ASJC) codes

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