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Nearby Earths Astrometric Telescope = NEAT

Nearby Earths Astrometric Telescope = NEAT. F. Malbet, A. Léger, M. Shao, R. Goullioud. Poster 4.15. TYC2 1424 (12.0). TYC2 1182 (12.0). TYC2 560 (11.6). TYC2 286 (11.1). TYC2 1246 (11.5). TYC2 1880 (11.3). TYC2 2188 (11.3). TYC2 1302 (12.0). TYC2 1542 (10.2). TYC2 478 (11.7).

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Nearby Earths Astrometric Telescope = NEAT

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  1. Nearby EarthsAstrometric Telescope= NEAT F. Malbet, A. Léger, M. Shao, R. Goullioud Poster 4.15

  2. TYC2 1424 (12.0) TYC2 1182 (12.0) TYC2 560 (11.6) TYC2 286 (11.1) TYC2 1246 (11.5) TYC2 1880 (11.3) TYC2 2188 (11.3) TYC2 1302 (12.0) TYC2 1542 (10.2) TYC2 478 (11.7) TYC2 1867 (10.8) TYC2 2176 (12.8) TYC2 2067(10.4) upsilon And (4.6) TYC2 1716 (10.6) 0.3° TYC2 1474 (11.6) TYC2 1969 (12.1) TYC2 1668 (10.0) TYC2 1396 (12.0) TYC2 352 (12.7) TYC2 2010 (10.0) TYC2 454(9.8) TYC2 602(10.1) TYC2 707(12.2) Differential astrometry Specifications: • 0.30uas → 0.05 uas rms • ==> ~ 0.8 uas/hr x 200 visits

  3. Concept Telescope spacecraft Metrology Detector spacecraft Off-axis parabolic mirror (D~1m) Sun shades Focal plane array (FOV~0.6°, ∅~0.5m) Focal length (~40m) Free flyers

  4. Telescope spacecraft Metrology Focal plane Young’s interference fringes Detector spacecraft 1 fixed CCD 8 movable CCDs 0.6° FOV, ~0.5m Metrology • calibrate the stellar image positions

  5. J S N U GAIA @ 50pc Ground-based Imaging Transit E V Radial velocities @ 1m/s Microlensing M2 G2 K2 F2 M DARWIN Astrometry 0.05uas @ 10pc

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