Stacking Fermi-LAT data from 21 blazars aligned to their jet directions detects anisotropic extended emission consistent with pair halos produced by a 2.8 x 10^{-16} G intergalactic magnetic field at 3.8 sigma.
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TeV gamma-ray optical depths yield a local EBL intensity consistent with integrated galaxy light to within 25% over 0.5-30 microns and incompatible at 3-5 sigma with near-IR excesses from IRTS and CIBER.
Plasma instabilities on ~100 kpc scales cool pairs in GeV cascades from 1ES 0229+200, yielding an IGMF strength of order 10^{-17} G when fitted to Fermi-LAT observations.
citing papers explorer
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Search for Anisotropic Pair Halos Associated with Blazar Jets
Stacking Fermi-LAT data from 21 blazars aligned to their jet directions detects anisotropic extended emission consistent with pair halos produced by a 2.8 x 10^{-16} G intergalactic magnetic field at 3.8 sigma.
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A TeV-based Determination of the Local Extragalactic Background Light and its Consistency with Galaxy Counts and Direct Measurements
TeV gamma-ray optical depths yield a local EBL intensity consistent with integrated galaxy light to within 25% over 0.5-30 microns and incompatible at 3-5 sigma with near-IR excesses from IRTS and CIBER.
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A parametric study of plasma instability cooling and its impact on intergalactic magnetic field constraints in GeV cascades
Plasma instabilities on ~100 kpc scales cool pairs in GeV cascades from 1ES 0229+200, yielding an IGMF strength of order 10^{-17} G when fitted to Fermi-LAT observations.