16530
收藏DataCite Commons2023-04-21 更新2025-04-15 收录
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http://esdcdoi.esac.esa.int/doi/html/data/astronomy/hst/16530.html
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资源简介：
Monitor the change in sensitivity over time with visits to the WD standard stars comma GD71 comma GD153 comma G191B2B comma and GRW+70 5824. Verify and refine the WFC photometric calibrations and repeatability measures. Single bright stars with photon statistical noise of virgul0.2% are a more precise and straightforward approach to measuring sensitivity changes than with the multitude of stars in 47 Tuc. This program has executed annually since Cycle 19.
提供机构：
European Space Agency
创建时间：
2023-04-21
