Working with a space-based optical interferometer - HST Fine Guidance Sensor 3 small field astrometry

被引:6
|
作者
Benedict, GF [1 ]
McArthur, B [1 ]
Nelan, EP [1 ]
Jefferys, WH [1 ]
Franz, OG [1 ]
Wasserman, LH [1 ]
Story, DB [1 ]
Shelus, PJ [1 ]
Whipple, AL [1 ]
Bradley, A [1 ]
Duncombe, RL [1 ]
Wang, Q [1 ]
Hemenway, PD [1 ]
van Altena, WF [1 ]
Fredrick, LW [1 ]
机构
[1] Univ Texas, McDonald Observ, Austin, TX 78712 USA
来源
ASTRONOMICAL INTERFEROMETRY, PTS 1 AND 2 | 1998年 / 3350卷
关键词
D O I
10.1117/12.317200
中图分类号
V [航空、航天];
学科分类号
08 ; 0825 ;
摘要
Space-based interferometry already exists. We describe our experiences with on-orbit calibration and scientific observations with Fine Guidance Sensor 3 (FGS3), a white-light interferometer aboard Hubble Space Telescope. Our goal, 1 millisecond of are precision small-field astrometry, has been achieved, but not without significant challenges. These included a mechanically noisy on-orbit environment, the self-calibration of FGS 3, and significant temporal changes in our instrument. Solutions included a denser set of drift check stars for each science observation, fine-tuning exposure times, overlapping field observations and analyses for calibration, and a continuing series of trend-monitoring observations. HST FGS 3 will remain a competitive astrometric tool for faint targets in crowded fields and for faint small separation binaries until the advent of large-aperture, ground-based and longer-baseline space-based interferometers.
引用
收藏
页码:229 / 236
页数:8
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