Fig. 9.
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Differential sensitivity with 50 h of VERITAS observations calculated using different low zenith angle Crab Nebula data, with winter atmospheric profile conditions. The same cuts as in Fig. 7 are used. The sensitivity is defined in terms of the flux of the Crab Nebula (in Crab units, CU) assuming it is a reference astrophysical object at VHE energies.
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