ABSTRACT
The notion that observed radiation can extend to the 10 eV is quite and surprising, and is driven more by the possible observation of X-ray emission than by theoretical considerations. If extensive air shower's from point sources are indeed γ-rays, then tagging muon-poor showers increases the signal-to-noise ratio by roughly another order of magnitude. Cygnus X-3 is the centerpiece of recent studies of point sources. Akeno sees a phase enhancement from Cygnus only when muon-poor showers are selected, while the Cygnus array sees no significant decrease in muon number from showers contributing to the phase enhancement. Acceleration of protons and interaction of protons with matter and the subsequent production and decay of pi-zeros to form the observed γ-rays is likely to occur in different regions of space, since the strong fields needed for acceleration will also cause absorption of γ-rays.
