Calibration of the LSST instrumental and atmospheric photometric passbands
Calibration of the LSST instrumental and atmospheric photometric passbands
复制标题
LSST 仪器和大气光度通带的校准
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Lsst Project Team
中科院分区：
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作者：
D. Burke;T. Axelrod;A. Barrau;S. Baumont;S. Blondin;C. Claver;A. Gorecki;Ž. Ivezić;L. Jones;V. Krabbendam;M. Liang;A. Saha;Allyn Smith;R. Smith;C. Stubbs;C. Vescovi;Lsst Project Team
大型天气观测望远镜(LSST)将在全年每3-4个晚上连续拍摄一次从智利北部塞罗帕雄可以看到的整个天空。LSST将为广泛的科学调查提供数据，这些科学调查要求整个天空的光度精度(重复性和一致性)优于1%，以及测量的宽带颜色的类似精度。LSST测量的快速和持久的节奏将显著提高跟踪天体事件和运动的时间采样率。为了实现这些目标，并以最佳方式利用观测日历，有必要对在各种观测条件下采集的数据--即使是那些通常不被认为是“光度学”的数据--进行良好的光度校准。为了实现这一点，必须例行准确地测量包括大气以及仪器望远镜和摄像系统在内的全部光学通带。LSST山地设施将包括一个新的单色穹顶照明投影仪系统，以测量系统中每个通道的仪器通带的详细波长相关性。该设施还将包括一个辅助光谱望远镜，专门用于在LSST观测期间测量天空中所有位置的大气透明度。在本文中，我们描述了这些系统，并提供了实验室和观测数据来说明它们的性能。
The Large Synoptic Survey Telescope (LSST) will continuously image the entire sky visible from Cerro Pachon in northern Chile every 3-4 nights throughout the year. The LSST will provide data for a broad range of science investigations that require better than 1% photometric precision across the sky (repeatability and uniformity) and a similar accuracy of measured broadband color. The fast and persistent cadence of the LSST survey will significantly improve the temporal sampling rate with which celestial events and motions are tracked. To achieve these goals, and to optimally utilize the observing calendar, it will be necessary to obtain excellent photometric calibration of data taken over a wide range of observing conditions - even those not normally considered "photometric". To achieve this it will be necessary to routinely and accurately measure the full optical passband that includes the atmosphere as well as the instrumental telescope and camera system. The LSST mountain facility will include a new monochromatic dome illumination projector system to measure the detailed wavelength dependence of the instrumental passband for each channel in the system. The facility will also include an auxiliary spectroscopic telescope dedicated to measurement of atmospheric transparency at all locations in the sky during LSST observing. In this paper, we describe these systems and present laboratory and observational data that illustrate their performance.