=====================================================================
==> In this proposal, more time is being requested for FMIRABEL.EARLY
=====================================================================
The aim of this proposal is to complete and extend the open time search for
starbursts in cluster environments at epochs close to their formation.  It is
based on the strong probability that elliptical galaxies went through an
infrared luminous phase at redshifts of z = 3-5, and the expectation that
infrared quasars and damped Lyman alpha systems are the light-houses that will
guide us to the large concentrations of matter in the early epochs of the
Universe.
The quick analysis of 10x10 arc min deep survey with CAM-LW10 at 12 microns
around two quasars at z = 3.4 and z = 3.8 revealed about 40 sources per field (5
sigma), half of them with no counterparts in the Palomar Plates.  Although the
nature of these sources is still unknown, preliminary results from ground based
observations at other wavelengths suggest that many of the ISOCAM sources are in
fact staburst galaxies at redshifts >~ 1.3.  To know the broad band spectral
index of the newly found sources we propose observations with ISOCAM-LW2 at 7
microns and PHOT-22 at 90 microns.
Given the succes of this observational program we wish to extend the 10x10 arc
min survey to other dusty quasars and damped systems at z > 1.6.  We have
selected 7 dusty quasars and 4 striking damped Lyman alpha systems to be mapped
with the ISOCAM LW2 and LW10 filters, and ISOPHOT at 90 microns.