SIMBAD references

Harwit, Protheroe, and Biermann recently proposed that Bose-Einstein photon bunching might significantly affect the interpretation of Cerenkov counts of TeV gamma photons. Here we show that a combination of two recent results by Aharonian and coworkers permits us to set new, more stringent upper limits of ≲10% on the fractional amount of photon bunching in the 7-10 TeV radiation from Markarian 501. Potential bunching at even higher energies should nevertheless continue to be investigated for this and other TeV sources since a clear understanding of TeV energy spectra is required to determine unambiguously the spectral energy density of the mid-infrared extragalactic background.