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Summary: A&A 392, 231237 (2002)
DOI: 10.1051/0004-6361:20020933
c ESO 2002
Astronomy
&
Astrophysics
A test for the search for life on extrasolar planets
Looking for the terrestrial vegetation signature in the Earthshine spectrum
L. Arnold1, S. Gillet2, O. Lardi`ere2, P. Riaud2,3, and J. Schneider3
1
Observatoire de Haute-Provence (OHP) CNRS, 04870 Saint-Michel-l'Observatoire, France
2
Laboratoire d'Interf´erom´etrie Stellaire et Exoplan´etaire (LISE) CNRS, 04870 Saint-Michel-l'Observatoire, France
e-mail: sgohp@obs-hp.fr; lardiere@obs-hp.fr; riaud@obs-hp.fr
3
Observatoire de Paris-Meudon, 92195 Meudon Cedex, France
e-mail: Jean.Schneider@obspm.fr; Pierre.Riaud@obspm.fr
Received 24 December 2001 / Accepted 6 May 2002
Abstract. We report spectroscopic observations (400-800 nm, R 100) of Earthshine in June, July and October 2001 from
which normalized Earth albedo spectra have been derived. The resulting spectra clearly show the blue colour of the Earth due
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