Detection of the extra-Galactic background fluctuations at 170 $μ$m

Details Detection of the extra-Galactic background fluctuations at 170 $μ$m Detection of the extra-Galactic background fluctuations at 170 $μ$m

1999-10-14

arxiv.org/abs/astro-ph/9910255v2

Astronomy and Astrophysics

Astrophysics

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Scientific paper

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., 1999a). 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.

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