SIMBAD references

2014ApJ...784..138S - Astrophys. J., 784, 138 (2014/April-1)

An empirical determination of the intergalactic background light using near-infrared deep galaxy survey data out to 5 µm and the gamma-ray opacity of the universe.


Abstract (from CDS):

We extend our previous model-independent determination of the intergalactic background light, based purely on galaxy survey data, out to a wavelength of 5 µm. Our approach enables us to constrain the range of photon densities, based on the uncertainties from observationally determined luminosity densities and colors. We further determine a 68% confidence upper and lower limit on the opacity of the universe to γ-rays up to energies of 1.6/(1 + z) TeV. A comparison of our lower limit redshift-dependent opacity curves to the opacity limits derived from the results of both ground-based air Cerenkov telescope and Fermi-LAT observations of PKS 1424+240 allows us to place a new upper limit on the redshift of this source, independent of IBL modeling.

Abstract Copyright:

Journal keyword(s): BL Lacertae objects: individual: PKS 1424+240 - diffuse radiation - gamma rays: general

Simbad objects: 2

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