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首页> 外文期刊>The Astrophysical journal >AROUND-THE-CLOCK OBSERVATIONS OF THE Q0957+561A,B GRAVITATIONALLY LENSED QUASAR. II. RESULTS FOR THE SECOND OBSERVING SEASON
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AROUND-THE-CLOCK OBSERVATIONS OF THE Q0957+561A,B GRAVITATIONALLY LENSED QUASAR. II. RESULTS FOR THE SECOND OBSERVING SEASON

机译：Q0957 + 561A，B引力透镜状准星的全天候观测。二。第二次观察的结果

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摘要

We report on an observing campaign in 2001 March to monitor the brightness of the later arriving Q0957+561B image in order to compare with the previously published brightness observations of the (first-arriving) A image. The 12 participating observatories provided 3543 image frames, which we have analyzed for brightness fluctuations. From our classical methods for time-delay determination, we find a 417.09 +- 0.07 day time delay, which should be free of effects due to incomplete sampling. During the campaign period, the quasar brightness was relatively constant and only small fluctuations were found; we compare the structure function for the new data with structure function estimates for the 1995―1996 epoch and show that the structure function during our observing interval is unusually depressed. We also examine the data for any evidence of correlated fluctuations at zero lag. We discuss the limits of our ability to measure the cosmological time delay if the quasar's emitting surface is time resolved, as seems likely.
机译：我们报告了2001年3月的一次观测活动，以监视后来到达的Q0957 + 561B图像的亮度，以便与先前发布的（先到达）A图像的亮度观测值进行比较。 12个参与观测的天文台提供了3543个图像帧，我们对它们进行了亮度波动分析。从我们确定​​时滞的经典方法中，我们发现了417.09±0.07天的时延，该时延应不受采样不完全的影响。在战役期间，类星体亮度相对恒定，仅发现很小的波动。我们将新数据的结构函数与1995-1996时期的结构函数估计值进行比较，结果表明在我们的观测间隔内，结构函数异常地受压。我们还将检查数据是否存在零滞后相关波动的任何证据。我们讨论了如果类星体的发射表面是时间分辨的，那么我们测量宇宙学时间延迟的能力的局限性（似乎是有可能的）。

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