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A Determination of the Intergalactic Redshift Dependent UV-Optical-NIR Photon Density Using Deep Galaxy Survey Data and the Gamma-Ray Opacity of the UniverseWe calculate the intensity and photon spectrum of the intergalactic background light (IBL) as a function of red shift using an approach based on observational data obtained at in different wavelength bands from local to deep galaxy surveys. Our empirically based approach allows us, for the firs.t time, to obtain a completely model independent determination of the IBL and to quantify its uncertainties. Using our results on the IBL, we then place upper and lower limits on the opacity of the universe to gamma-rays, independent of previous constraints.
Document ID
20120015924
Acquisition Source
Goddard Space Flight Center
Document Type
Abstract
Authors
Stecker, Floyd W. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 26, 2013
Publication Date
October 28, 2012
Subject Category
Astrophysics
Report/Patent Number
GSFC.ABS.7290.2012
Report Number: GSFC.ABS.7290.2012
Meeting Information
Meeting: Fourth International Fermi Symposium
Location: Monterey, CA
Country: United States
Start Date: October 28, 2012
End Date: November 3, 2012
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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