Measuring the EBL using GeV and TeV observations
Abstract
The collective emission of all sources over the history of the universe is encoded in the intensity of the extragalactic background light (EBL), the diffuse cosmic radiation field at ultraviolet, optical, and infrared wavelengths. A powerful technique to study the EBL is through the imprint it leaves in the spectra of distant gamma-ray sources via the photon-photon interaction. In this talk, I will report on the first unprecedented measurement of the EBL, in the UV, optical and IR wavelength regime, using GeV data from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope and TeV data from ground based telescopes (like HESS, MAGIC, and VERITAS). I will also talk about the future implications of the work including improvements which would be seen using observations from future programs like CTA.
- Publication:
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AAS/High Energy Astrophysics Division
- Pub Date:
- March 2019
- Bibcode:
- 2019HEAD...1710610D