We present relative astrometric and photometric measurements of visual binaries made in 2009-2010, with the 76-cm refractor of Cote d’Azur Observatory and a pair ofsensitive EMCCD ANDOR cameras. Ourobserving list consists of optical pairs and binaries whoseorbital motion is still uncertain. Three differenttechniques were used for obtaining measurements: Lucky Imaging, Speckle Interferometry and the Direct Vector Autocorrelation method. From the 2050 observationsof double stars that we performed, we obtained1652 new measurements of the relative position of 1792 objects, with angular separations in the range 0′′.1— 14′′.1. The average accuracy is estimated at 0′′.02 for the angular separations and 0◦.6 for the positionangles. We managed to observe faint systems (mV≈12) with large magnitude difference (up to ∆mV≈5).We have thus been able to measure many systems containing reddwarf stars that had been poorly monitoredsince their discovery. We also measured the difference of magnitude of the two components of 1143 objectswith an estimated error of 0.2 mag.

中文翻译：

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2009-2010 年使用 EMCCD 相机和 Nice 76-cm 折射仪测量视觉双星

我们展示了 2009-2010 年使用蔚蓝海岸天文台的 76 厘米折射镜和一对灵敏的 EMCCD ANDOR 相机对视觉双星进行的相对天体测量和光度测量。我们的观测列表由轨道运动仍不确定的光学对和双星组成。三种不同的技术用于获得测量值：幸运成像、散斑干涉法和直接矢量自相关方法。从我们对双星进行的 2050 次观测中，我们获得了 1792 个天体相对位置的 1652 个新测量值，角度间隔在 0''.1—14''.1 范围内。角间距的平均精度估计为 0''.02，位置角的平均精度估计为 0°.6。我们设法观察到具有较大幅度差异（高达 ∆mV≈5）的微弱系统（mV≈12）。因此，我们能够测量许多包含自发现以来监测不佳的红矮星的系统。我们还测量了 1143 个物体的两个分量的星等差异，估计误差为 0.2 mag。