标题： 天蝎座δ 2011近日点：目视和数字测光活动 显示英文标题

标题： Delta Scorpii 2011 periastron: visual and digital photometric campaign

摘要： 对2011年4月至9月期间对天蝎座δ的100次观测，通过AAVSO进行目视和数字观测，并使用商用CMOS相机绘制了图表。使用目标恒星和两个参考恒星中最明亮的三个像素通过差分测光来评估亮度。列出了主要的误差来源。天蝎座δ系统是一个光谱双星，在2011年7月经历了接近近日点的情况，当时在两个巨大成分的外层大气中。天蝎座δ的总亮度从大约Mv=1.8增加到1.65，在2011年7月5日至15日达到峰值，但在20天内出现了0.2-0.3星等的显著快速波动，这些波动似乎是真的，而不是由于参考恒星和观测条件变化导致的系统误差的结果。这种方法有望应用于其他明亮的变星，如参宿四和心宿二。 显示英文摘要

摘要： Hundred observations of Delta Scorpii, from April to September 2011, made for AAVSO visually and digitally with a commercial CMOS camera have been plotted. The three most luminous pixels either of the target star and the two reference stars are used to evaluate the magnitude through differential photometry. The main sources of errors are outlined. The system of Delta Scorpii, a spectroscopic double star, has experienced a close periastron in July 2011 within the outer atmospheres of the two giant components. The whole luminosity of Delta Scorpii increased from about Mv=1.8 to 1.65 peaking around 5 to 15 July 2011, but there are significant rapid fluctuations of 0.2-0.3 magnitudes occuring in 20 days that seem to be real, rather than a consequence of systematic errors due to the changes of reference stars and observing conditions. This method is promising for being applied to other bright variable stars like Betelgeuse and Antares.