000003564 001__ 3564
000003564 005__ 20180920143646.0
000003564 037__ $$aPOSTER-2018-0043
000003564 100__ $$aKatsiyannis, A.C.
000003564 245__ $$aThe detection of ultra-relativistic electrons in low Earth orbit by the LYRA instrument on board the PROBA2 satellite
000003564 260__ $$c2018
000003564 269__ $$c2018-05-20
000003564 520__ $$aThe Large Yield RAdiometer (LYRA) is an ultraviolet radiometer on-board ESA's PROBA2 micro-satellite. Since its 2009 launch it observes the Sun in four different passbands, chosen for their relevance to solar physics, aeronomy and space weather. Flying on an altitude of 725 km, LYRA proved to be an excellent flare monitor and is involved in the analysis of the atmospheric composition of the Earth. We present the analysis of energetic particles, indirectly detected by LYRA in the form of microbursts of $<$10 ms, with a phenomenon duration of 100 s. Combining Energetic Particle Telescope (EPT) observations with LYRA data for an overlapping period of time, we identified these particles as electrons with an energy range of 2 to 8 MeV. The observed events are strongly correlated to geo-magnetic activity and appear even during modest disturbances. Additionally, they are well confined geographically within the L=4-6 McIlwain zones, and they show prominent dawn-dusk and day-night asymmetries. A combination of wave-particle interaction mechanisms is proposed as a starting point towards a full quantitative explanation. 
000003564 536__ $$a2BRAIN_SOL3CAM/$$c2BRAIN_SOL3CAM/$$f2BRAIN_SOL3CAM
000003564 594__ $$aSTCE
000003564 700__ $$aDominique, M.
000003564 700__ $$aPierrard, V.
000003564 700__ $$aLopez Rosson, G.
000003564 773__ $$tTriennial Earth Sun Summit 2018, Leesbourg, Virginia, USA
000003564 8560_ $$fthanassis.katsiyannis@observatoire.be
000003564 85642 $$ahttps://connect.agu.org/tess2018/home
000003564 8564_ $$s1685964$$uhttp://publi2-as.oma.be/record/3564/files/poster_tess18.pdf
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000003564 980__ $$aCPOSTER