The impulsive X-ray burst of October 10, 1970 |
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| Authors: | S R Kane S W Kahler J D Kurfess |
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| Institution: | (1) Space Sciences Laboratory, University of California, 94720 Berkeley, Calif., U.S.A.;(2) E. O. Hulburt Center, Naval Research Laboratory, 20390, Washington, D.C., U.S.A. |
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| Abstract: | An impulsive burst of 100–400 keV solar X-rays associated with a small solar flare was observed on October 10, 1970 with a large area scintillator aboard a balloon floating at an altitude of 4.2 g cm-2 above the Earth's surface. The X-ray burst was also observed simultaneously in 10–80 keV range by the OGO-5 satellite and in 8–20 Å range by the SOLRAD-9 satellite. The impulsive X-ray emission reached its maximum at  1643 UT at which time the differential photon spectrum in 20–80 keV range was of the form 2.3 × 104
E
-3.2 photons cm-2 s-1 keV-1 at 1 AU. The event is attributed to a H -subflare located approximately at S13, E88 on the solar disc. The spectral characteristics of this event are examined in the light of the earlier X-ray observations of small solar flares. |
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