Improvement of gamma-hadron discrimination at TeV energies using a new parameter, image Surface Brightness

Details Improvement of gamma-hadron discrimination at TeV energies using a new parameter, image Surface Brightness Improvement of gamma-hadron discrimination at TeV energies using a new parameter, image Surface Brightness

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aph.....7..307b&link_type=abstract

ASTROPARTICLE PHYSICS, Volume 7, Issue 4, p. 307-314.

Physics

2

Scientific paper

The recent advances in TeV gamma-ray astronomy using imaging Cerenkov telescopes is mainly due to the good separation between the properties of gamma-ray and hadronic showers. A new method for this discrimination is described. The method is mainly based on the change of the image's Size and Surface Brightness (Size/Area) with energy and the differences in these parameters between those initiated by gamma-rays and hadrons. The application of the method to the Whipple's 10 m telescope database from the Crab Nebula and Markarian 421 demonstrates its sensitivity to gamma-hadron separation. This study shows the importance of the image Surface Brightness, in addition to the previously used Shape and Orientation parameters.

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