All Figures

Figure 1: Number of events vs. squared angular distance to the position of 1ES 1959+650, observed on May 18/19 and 19/20, 2002, with the HEGRA IACT system. The dots show the ON-source events, the histogram gives the background estimate determined from a ring segment as explained in the text. The statistical error for the background estimate is much smaller than the error of the ON-source distribution. Upper right: Similar distributions for the year 2000/2001 observations yielding a significance of 5.2 .

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In the text

Figure 2: Diurnal integral flux values resp. upper limits (99% c. l.) observed above 2 TeV vs. the modified Julian date (MJD) for the year 2002 HEGRA IACT system data. Strong flux variations are visible in May and July. The level of the flux of the Crab nebula is indicated by the horizontal dashed line. The time gaps between the individual observation periods are due to the full moon periods when no observations were possible.

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In the text

Figure 3: Time averaged spectral energy distributions (SED) of 1ES 1959+650 as measured with the HEGRA IACT system. The filled circles show the spectrum during 6 high state nights in 2002, while the filled squares show the SED for the combination of all low state nights (<0.5 Crab). The results of fits of a power law with an exponential cut-off (solid lines) resp. a pure power law (dashed lines) are indicated. The open circles show the high state spectrum corrected for the DEBRA absorption (see text).

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In the text