The bright quasar Kaz 102, which lies in the vicinity of the North Ecliptic Pole, was monitored during the ROSAT All Sky Survey for 121.5 days from 1990 July 30 to 1991 January 25. In the course of the survey, optical photometry with various filters was performed at several epochs, together with UV (IUE) and optical spectrophotometry. The spectral energy distribution in the 3 x 10~(14)-3 x 10~(17) Hz range is obtained simultaneously among the various frequencies to approx< 1 day. No clear case of variability can be made in the X-rays, while in the optical and UV variability of 10%-20% is apparent. An analysis of IUE and Einstein archives indicates a doubling timescale of years for the UV and soft X-ray flux. The X-ray photon index, which in 1979 was rather flat (Γ = 0.81_(-0.4)~(+0.6)), in 1990/1991 was found to be Γ = 2.22 ± 0.13, a typical value for radio-quiet quasars in this energy range. The overall energy distribution and the variability are discussed.
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机译：在1990年7月30日至1991年1月25日期间进行的ROSAT全天候勘测中，对位于北黄道附近的明亮类星体Kaz 102进行了121.5天的监测。在调查过程中，使用了各种滤光片进行光学测光。在几个时期内进行了检测，同时还进行了UV（IUE）和分光光度法。在大约不到1天的各种频率之间同时获得3 x 10〜（14）-3 x 10〜（17）Hz范围内的频谱能量分布。在X射线中没有明确的可变性情况，而在光学和紫外线中则有10％-20％的可变性。对IUE和爱因斯坦档案的分析表明，紫外线和软X射线通量的使用年限翻了一番。 X射线光子指数在1979年相当平坦（Γ= 0.81 _（-0.4）〜（+0.6）），在1990/1991年被发现是Γ= 2.22±0.13，这是无线电安静的典型值在此能量范围内的类星体。讨论了整体能量分布和可变性。
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