Detection of the extra-Galactic background fluctuations at 170 mu m
G. Lagache, J. L. Puget;
AaA, 2000, 355, 17
ABSTRACT:We have used the Marano1 field observations with ISOPHOT at 170 mu m to search for the Cosmic Far-InfraRed Background fluctuations.
This field is
part of the FIRBACK project (Puget et al.
1999).
For the first time,
fluctuations due to unresolved extra-Galactic sources are isolated.
The emission
of such sources clearly dominates, at arcminute scales, the background
fluctuations in the lowest Galactic emission regions.
The study presented here is
based on a power spectrum analysis which allow to statistically separate
each of the background components.
With this analysis, we clearly show
that we detect the CFIRB fluctuations.
Based on observations with ISO, an
ESA project with instruments funded by ESA Member States (especially the
PI countries: France, Germany, the Netherlands and the United Kingdom)
and with the participation of ISAS and NASA
KEYWORDS: cosmology: diffuse radiation, infrared: ism: continuum, infrared: general
CODE: lagache2000