Abstract
With a spectrometer aboard the ESRO TD-1A satellite, time profiles and photon spectra of solar X-rays have been observed in the energy range above 24 keV. Most of the X-ray bursts studied thus far appear to consist of numerous short-lived spikes with rise and decay times of a few seconds. Such spikes, called ‘Elementary Flare Bursts’ (EFB’s) cluster together in large numbers and constitute the conventional high energy flare. The form of the photon spectra could be determined very accurately and was in all cases of the power-law type. For the August 4, 1972 flare, the photon spectra appear to be combinations of two power-law spectra; for the lower energies the spectral coefficient is smaller than for the higher energies. The transition energy is about 60 keV.
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© 1974 D. Reidel Publishing Company, Dordrecht-Holland
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Van Beek, H.F., De Feiter, L.D., De Jager, C. (1974). Time Profiles and Photon Spectra of Solar Hard X-Rays. In: Page, D.E. (eds) Correlated Interplanetary and Magnetospheric Observations. Astrophysics and Space Science Library, vol 42. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-2172-2_34
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DOI: https://doi.org/10.1007/978-94-010-2172-2_34
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