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The impulsive X-ray burst of October 10, 1970

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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 Hα-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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Authors and Affiliations

  1. Space Sciences Laboratory, University of California, 94720, Berkeley, Calif., U.S.A.

    S. R. Kane

  2. E. O. Hulburt Center, Naval Research Laboratory, 20390, Washington, D.C., U.S.A.

    S. W. Kahler & J. D. Kurfess

Authors
  1. S. R. Kane
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  2. S. W. Kahler
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  3. J. D. Kurfess
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Kane, S.R., Kahler, S.W. & Kurfess, J.D. The impulsive X-ray burst of October 10, 1970. Sol Phys 25, 418–424 (1972). https://doi.org/10.1007/BF00192339

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  • DOI: https://doi.org/10.1007/BF00192339

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