EBL studies with ground-based VHE gamma-ray detectors: Current status
  and potential of next-generation instruments
  The diffuse meta-galactic radiation field at ultraviolet to infrared
wavelengths - commonly labeled extragalactic background light (EBL) - contains
the integrated emission history of the universe. Difficult to access via direct
observations, indirect constraints on its density can be derived through
observations of very-high energy (VHE; E>100 GeV) gamma-rays from distant
sources: the VHE photons are attenuated via pair-production with the low energy
photons from the EBL, leaving a distinct imprint in the VHE spectra measured on
earth. Discoveries made with current-generation VHE observatories like
H.E.S.S., MAGIC and VERITAS enabled strong constraints on the density of the
EBL, especially in the near-infrared. Here, the constrains on the EBL density
from such ground based VHE observations will be briefly reviewed and the
potential of the next-generation instruments to improve on these limits will be
discussed.
