Solar Origin of Anisotropic Electron Events observed by ULYSSES and ACE |
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Authors: | Pick M Maia D Hawkins SE |
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Institution: | (1) DASOP, UMR 8645 CNRS, Observatoire de Paris-Meudon, France;(2) The John Hopkins University Applied Physics Laboratory, Laurel, MD, 20723-6099, U.S.A |
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Abstract: | We investigate the solar origin of energetic collimated electron events observed in situ by the EPAM and/or HISCALE particle
experiments aboard the ACE and ULYSSES spacecraft, respectively. This study has been performed for two months, September and
October 1999 when Ulysses was magnetically connected to the solar disk at heliolongitudes visible at the Earth. The two spacecraft were separated by
about 35° in latitude and up to 60° in longitude. In this paper, results are described for one period only, October 24–November
1, 1999. It is found that not all the anisotropic events are observed by both spacecrafts; there exists a strong dependence
on the spacecraft's magnetic connection back to the Sun.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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