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In-situ photopolarimetric measurements of dust and gas in the coma of Halley's comet |
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| Authors: | A -C Levasseur-Regourd J -L Bertaux J M Le Blanc |
| Institution: | * Université Paris VI — Service d'Aéronomie CNRS, BP 3 91371, Verrières le Buisson, France ** Space Astronomy Laboratory, 1810 NW 6 St, Gainesville, FL 32601, USA *** Observatoire de Bordeaux, 33270, Floirac, France † Observatoire de Besançon, 25044, Besançon, France ‡ Ruhr Universität, Postfach 102148, 4630, Bochum, FRG § Laboratoire d'Astronomie Spatiale, Les Trois Lucs, 13012, Marseille, France |
| Abstract: | The Halley Optical Probe Experiment (HOPE) on board the Giotto spacecraft has provided the first in-situ measurements, both of the dust and of some gaseous species, from inside the coma of the comet. The instrument has already been described /1/, together with first results /2/. The purpose of this note is to show how optical measurements can lead to in-situ information, how those were obtained during the 13–14 march 1986 Halley fly-by, and what is the status of the data analysis. |
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