Photon Bunching at TeV Energies

Details Photon Bunching at TeV Energies Photon Bunching at TeV Energies

2001-09-07

arxiv.org/abs/astro-ph/0109128v1

Astrophys.J. 556 (2001) L21-L24

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1086/322869

Harwit, Protheroe, and Biermann (1999) 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 of Aharonian et al. (2000) and Aharonian et al. (2001) permits us to set new, more stringent upper limits of $\lesssim 10%$ 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 unambiguously determine the spectral energy density of the mid-infrared extragalactic background.

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