The concept of a stare-mode astrometric space mission

Details The concept of a stare-mode astrometric space mission The concept of a stare-mode astrometric space mission

2006-08-14

arxiv.org/abs/astro-ph/0608286v1

Astronomy and Astrophysics

Astrophysics

accepted for PASP Oct.2006, 3 tables, no figures

Scientific paper

10.1086/508299

The concept of a stare-mode astrometric space mission is introduced. The traditionally accepted mode of operation for a mapping astrometric space mission is that of a continuously scanning satellite, like the successful Hipparcos and planned Gaia missions. With the advent of astrometry missions mapping out stars to 20th magnitude, the stare-mode becomes competitive. A stare-mode of operation has several advantages over a scanning missions if absolute parallax and throughput issues can be successfully addressed. Requirements for a stare-mode operation are outlined. The mission precision for a stare-mode astrometric mission is derived as a function of instrumental parameters with examples given. The stare-mode concept has been accepted as baseline for the NASA roadmap study of the Origins Billions Star Survey (OBSS) mission and the Milli-arcsecond Pathfinder Survey (MAPS) micro-satellite proposed project.

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