The Optical Gravitational Lensing Experiment

光学引力透镜实验

• 批准号: 9820314
• 负责人: Bohdan Paczynski
• 金额: $ 56万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-07-01 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9820314&HistoricalAwards=false
• 关键词: Optical; Gravitational; Lensing; Experiment

Paczynski, BohdanPrinceton University AST-9820314Dr. Paczynski and collaborators will continue and expand the very successful Optical Gravitational Lensing Experiment (OGLE) to monitor millions of stars towards the Galactic Bulge and the Magellanic Clouds, with the goal of detecting and analyzing gravitational microlensing events. The collaborative project involves astronomers at the Warsaw University Observatory and their 1.3-meter telescope at Las Campanas Observatory in Chile. They will upgrade the CCD camera to install an 8K x 8K mosaic and will implement image subtraction software in the data flow. These improvements will increase the data rate, and microlensing detections, by an order of magnitude, to more than 500 events per year, and increase the accuracy of the photometry by a factor of at least two. The OGLE project uses standard BVI photometric bandpasses, and yields vast numbers of variable stars which can be analyzed for a variety of astrophysical projects. Of particular interest are issues in galactic structure and stellar populations such as a determination of the optical depth to microlensing events to verify models of the mass distribution in the inner galaxy, and the calibration of the extragalactic distance scale. The OGLE project makes data available to the public as soon as is practically feasible, to maximize the science to come from the survey by themselves and others.

Paczynski，BohdanPrinceton University AST-9820314Dr. Paczynski和合作者将继续并扩大非常成功的光学引力透镜实验（OGLE），以监测银河系膨胀和麦哲伦云的数百万颗恒星，目标是检测和分析引力微透镜事件。 该合作项目涉及华沙大学天文台的天文学家和他们在智利Las Campanas天文台的1.3米望远镜。 他们将升级CCD摄像机以安装8 K x 8 K马赛克，并将在数据流中实施图像减法软件。 这些改进将使数据速率和微透镜探测增加一个数量级，达到每年500多个事件，并将测光的准确性提高至少两倍。 OGLE项目使用标准的BVI测光带通，并产生大量的变星，可以为各种天体物理项目进行分析。 特别令人感兴趣的是星系结构和恒星种群的问题，如确定微透镜事件的光学深度，以验证内星系质量分布的模型，以及河外距离尺度的校准。 OGLE项目在实际可行的情况下尽快向公众提供数据，以最大限度地利用他们自己和其他人调查得出的科学结论。