Table 1: Individual periods of 1ES 1959+650 observations with the HEGRA IACT system. Listed are the total observation times and mean zenith angles $\langle \vartheta
\rangle$. Typically, each night comprises about 1 h of observation time.

Date
Year Obs. Time $\langle \vartheta
\rangle$
    [h] [$^\circ$]

July 28-August 2
2000 8.2 40.0
August 28-September 6 2000 10.2 40.7

May 18-June 1
2001 13.0 37.4
June 22-June 28 2001 15.5 38.1
July 11-July 22 2001 8.5 38.1
August 9-August 25 2001 17.5 37.2
September 6-September 19 2001 15.0 37.3
October 11-October 21 2001 19.9 40.1

May 18-May 21
2002 10.0 41.8
June 3-June 18 2002 34.4 38.5
July 1-July 18 2002 18.7 39.5
July 31-August 16 2002 20.2 38.4
September 3-September 11 2002 6.3 38.6

Sum
  197.4 38.8


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