EAS Publications Series

Mass Profiles and Shapes of Cosmological Structures
G.A. Mamon, F. Combes, C. Deffayet and B. Fort (eds)
EAS Publications Series, 20 (2006) 195-200
DOI: 10.1051/eas:2006071

The OSER project

M. Moniez

Laboratoire de l'Accélérateur Linéaire, IN2P3-CNRS, Université de Paris-Sud, BP. 34, 91898 Orsay Cedex, France;

moniez@lal.in2p3.fr

Abstract
The OSER project (Optical Scintillation by Extraterrestrial Refractors) is proposed to search for scintillation Of extragalactic sources through the galactic - disk or halo - transparent H₂ clouds, the last unknown baryonic structures. This project should allow one to detect column density stochastic variations in cool Galactic molecular clouds of order of $\sim 3\times 10^\,\mathrm{g/cm^2}$ per $\sim 10\,000\,\mathrm{km}$ transverse distance.