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Detection of the extra-Galactic background fluctuations at 170 μm

1999/10/14 by G. Lagache, Lagache, G., J.‐L. Puget +2 · 1 citation
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Astronomical Observations and Instrumentation #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Geophysics and Gravity Measurements #Scientific Research and Discoveries #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/9910255

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openalex publication_date 1999/10/14 · arxiv created 1999/10/20 · arxiv updated 2009/12/01 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28

Abstract

We have used the Marano1 field observations with ISOPHOT at 170 μm 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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