The Photometry of Astronomical Objects.: (Plates 11–13.)
نویسندگان
چکیده
منابع مشابه
Atmospheric scintillation in astronomical photometry
Scintillation noise due to the Earth’s turbulent atmosphere can be a dominant noise source in high-precision astronomical photometry when observing bright targets from the ground. Here we describe the phenomenon of scintillation from its physical origins to its effect on photometry. We show that Young’s scintillation-noise approximation used by many astronomers tends to underestimate the median...
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در سال های اخیر، تقاضای استفاده از تئوری خطی ویسکوالاستیسیته بیشتر شده است. با افزایش استفاده از کامپوزیت های پیشرفته در صنایع هوایی و همچنین استفاده روزافزون از مواد پلیمری، اهمیت روش های دقیق طراحی و تحلیل چنین ساختارهایی بیشتر شده است. این مواد جدید از خودشان رفتارهای مکانیکی ارائه می دهند که با تئوری های الاستیسیته و ویسکوزیته، نمی توان آن ها را توصیف کرد. این مواد، خواص ویسکوالاستیک دارند....
Photometry from online Digitized Sky Survey Plates
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How to analyze TeraBytes of photometric data, and extract knowledge on variable stars? How to detect variable phenomena? How to combine different photometric bands? Which algorithm to search for periods? How to characterize and classify the detected variable objects? Many questions, but certainly no definitive answers yet. We present several aspects which are at the interface of photometric sur...
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Saturated stellar images on digitised photographic plates are many times greater in area than the ‘seeing disk’ seen in unsaturated CCD images. Indeed the flux profile of a bright star can be traced out for several degrees from the star’s centre. The radius of the saturated stellar image can often be directly related to the magnitude of the star, a fact well known and exploited in iris photomet...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1926
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/86.8.600