The polarization of X-ray emission of some solar flares in July 1974

• DOI: 10.1007/bf00157568
• Publication Date: 2004-11-06T09:56:03Z
• Authors: I. P. Tindo; A. I. Shuryghin; W. Steffen
• Keywords: 0103 physical sciences; 01 natural sciences

Preliminary results of polarization measurements at three solar flares of July 5 and 6, 1974, are given. The measurements were performed at hν ≈ 15 keV with Thomson-scattering polarimeter on the ‘Intercosmos 11’ satellite. At the decay phase of the flare on July 5 we obtained P = 3.4–5.0%, which did not exclude some contribution from non-thermal processes. At the flares of July 6 we found P =1.0–1.9% and P = 0.1–2.0%, respectively: neither value exceeds the level of statistical fluctuations.