用小口径望远镜和图像减影法寻找银球微透镜事件
Finding the Brightest Galactic Bulge Microlensing Events with a Small Aperture Telescope and Image Subtraction
摘要：
根据Gould和Depoy（1998）的建议，我们研究了使用小孔径（~10 cm）望远镜研究朝向银河系凸起的最亮微透镜事件的可行性。我们使用一台HAT望远镜在2005年获得了88个夜晚的151次曝光，视场为8.4x8.4平方度，中心为（l，b）=（2.85，-5.00）。我们使用图像减影软件减少了数据。我们发现，这样的搜索方法可以有效地有助于监测明亮的微透镜事件，主张。将这种搜索方法与现有的方法进行比较，我们发现这种性质的专用凸起光度测量将以优异的性能和相当低的成本实现显著的利基。我们获得了2005年OGLE档案中列出的7个微透镜事件的匹配。我们发现了其他几个光变曲线，其拟合非常类似于微透镜事件。不出所料，我们的数据中也发现了许多周期变量和杂项变量，我们估计其中约有50%是新发现的。最后，我们简要地提出了小孔径微透镜巡天计划，该计划将昼夜不停地监测银河系的凸起，以提供最高放大率微透镜事件的密集覆盖。
英文摘要：
Following the suggestion of Gould and Depoy (1998) we investigate the feasibility of studying the brightest microlensing events towards the Galactic bulge using a small aperture (~10 cm) telescope. We used one of the HAT telescopes to obtain 151 exposures spanning 88 nights in 2005 of an 8.4x8.4 square degree FOV centered on (l,b) = (2.85, -5.00). We reduced the data using image subtraction software. We find that such a search method can effectively contribute to monitoring bright microlensing events, as was advocated. Comparing this search method to the existing ones we find a dedicated bulge photometric survey of this nature would fulfill a significant niche at excellent performance and rather low cost. We obtain matches to 7 microlensing events listed in the 2005 OGLE archives. We find several other light curves whose fits closely resemble microlensing events. Unsurprisingly, many periodic variables and miscellaneous variables are also detected in our data, and we estimate approximately 50% of these are new discoveries. We conclude by briefly proposing Small Aperture Microlensing Survey, which would monitor the Galactic bulge around the clock to provide dense coverage of the highest magnification microlensing events.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
