Increasing the Range and Accuracy of Current Bright Object High Precision Astrometry

提高当前明亮天体高精度天体测量的范围和精度

• 批准号: 0138222
• 负责人: George Gatewood
• 金额: $ 7.95万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-03-01 至 2004-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0138222&HistoricalAwards=false
• 关键词: Increasing; Range; Accuracy; Current; Bright

AST-0138222Gatewood, George D.The Multichannel Astrometric Photometer (MAP) at the Thaw Refractor of the University of Pittsburgh will be upgraded to extend the magnitude limit from its current level of twelve to fifteen and will be upgraded to increase its precision by a factor of two better than the current system. Precise, relative astrometry to a few milliarcseconds for a night's observing will be enabled. Unique aspects of the instrument include: a Ronchi grating scanned across the star field to modulate the stellar flux, angular distances between stars measured using the phase of the resulting signals, and the replacement of the old photomultipliers with avalanche photodiodes.***

AST-0138222盖特伍德，乔治D.匹兹堡大学解冻折射器的多通道天体测量光度计（MAP）将升级，将星等限制从目前的12等扩大到15等，并将升级，将其精度提高到目前系统的两倍。精确的，相对天体测量到几毫角秒的一个晚上的观察将成为可能。 该仪器的独特之处包括：扫描整个星星场以调制恒星通量的Ronchi光栅，使用产生的信号相位测量恒星之间的角距离，以及用雪崩光电二极管取代旧的光电倍增管。