Micro-arcsecond Astrometry Technology: Detector and Field Distortion Calibration

TL;DR

This paper discusses calibration techniques for detectors and field distortions to enable microarcsecond-level astrometry, crucial for exoplanet detection and astrophysical research, using a 6-meter telescope.

Contribution

It introduces calibration methods for detectors and field distortions to improve narrow field astrometry accuracy at the microarcsecond level.

Findings

Calibration techniques improve astrometric precision

Enhanced detector and distortion calibration enables better exoplanet detection

Methodology applicable to large telescopes for high-precision astrometry

Abstract

Microarcsecond (uas) astrometry is an indispensable technique to detect earth-like exoplanets, fully characterize exoplanetary orbits, and measure their masses --information critical for assessing their habitability. Highly accurate astrometric measurements can also probe the nature of dark matter, the early universe, black holes, and neutron stars, thus providing unique data for new astrophysics. This paper presents technologies of calibrating detectors and field distortions for achieving narrow field uas relative astrometry with a focal plane array detector on a 6 m telescope.