  Shock acceleration by the shells of supernova remnants (SNRs) has been
hypothesized to be the mechanism that produces the bulk of Galactic Cosmic
Rays, possibly up to PeV energies. Some SNRs have been shown to accelerate
cosmic rays to TeV energies and above. But which SNRs are indeed efficient
accelerators of protons and nuclei? And what is the maximum energy up to which
they can efficiently accelerate particles? Measurements of non-thermal
emission, especially in the gamma-ray regime, are essential to answer these
questions.
  The High-Altitude Water Cherenkov (HAWC) observatory, surveying the northern
TeV gamma-ray sky, is currently the most sensitive wide field-of-view survey
instrument in the VHE (very-high-energy, >100 GeV) range and has recorded more
than five years of data. The Large Area Telescope (LAT) onboard the Fermi
satellite has been surveying the GeV gamma-ray sky for more than ten years.
Combining measurements from both instruments allows the study of gamma-ray
emission from SNRs over many orders of magnitude in energy. In this
presentation, I will show measurements of VHE gamma-ray emission from
Fermi-LAT-detected SNRs with the HAWC Observatory.
