Constraints on the X-ray and Very High Energy ${\hat{I}}^3$-ray Flux from Supernova Remnant W44

A. Archer, P. Bangale, J. T. Bartkoske +55

Observations of GeV gamma-ray emission from the well-studied mixed-morphology supernova remnant (SNR) W44 by Fermi-LAT and AGILE imply that it is a site of significant cosmic ray a…