Near-UV to near-IR disk-averaged Earth\'s spectra from Moon\'s Earthshine observations

S. Hamdani (1) , L. Arnold (1) , C. Foellmi , J. Berthier , D. Briot , P. François (2) , P. Riaud (3) , Jodi Schneider (4)

1 OHP - Observatoire de Haute-Provence
2 GEPI - Galaxies, Etoiles, Physique, Instrumentation
3 LISEP - Laboratoire d'interférométrie stellaire et exo-planétaire
4 OP - Observatoire de Paris - Site de Paris

We discuss a series of Earthshine spectra obtained with the NTT/EMMI instrument between 320nm and 1020nm with a resolution of R~450 in the blue and R~250 in the red. These ascending and descending Moon\'s Earthshine spectra taken from Chile give disk-averaged spectra for two different Earth\'s phases. The spectra show the ozone (Huggins and Chappuis bands), oxygen and water vapour absorption bands, and also the stronger Rayleigh scattering in the blue. Removing the known telluric absorptions reveals a spectral feature around 700nm which is attributed to the vegetation stronger reflectivity in the near-IR, so-called vegetation red-edge.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]; Astrophysique [astro-ph]

S. Hamdani, L. Arnold, C. Foellmi, J. Berthier, D. Briot, et al.. Near-UV to near-IR disk-averaged Earth\'s spectra from Moon\'s Earthshine observations. SF2A-2005: Semaine de l'Astrophysique Francaise, meeting held in Strasbourg, France, June 27 - July 1, 2005, 2005, France. pp.157. ⟨hal-00017121⟩