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

页码：229 / 236

页数：8