Progress on the Astrometric Gravitation Probe design

Gai, M.; Vecchiato, Alberto; Riva, A.; Lattanzi, Mario Gilberto; Landini, Federico; Bucciarelli, B.; Busonero, D.; Crosta, M.; Liao, S.; Luo, Haoran; Mana, Giovanni; Pisani, Marco; Qi, Zhaoxiang; Sasso, C.P.; Tang, Zhenghong; Yu, Yong

doi:10.1117/12.2562644

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…A specific application for Fundamental Physics, with the addition of a custom coronagraphic system, is represented by the current Astrometric Gravitation Probe design. 18…”

Section: Introductionmentioning

confidence: 99%

The ASTRA project: a doorway to future astrometry

Gai

Lattanzi

et al. 2020

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV

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Astrometric Science and Technology Roadmap for Astrophysics (ASTRA) is a bilateral cooperation between China and Italy with the goal of consolidating astrometric measurement concepts and technologies. In particular, the objectives include critical analysis of the Gaia methodology and performance, as well as principle demonstration experiments aimed at future innovative astrometric applications requiring high precision over large angular separations (one to 180 degrees). Such measurement technologies will be the building blocks for future instrumentation focused on the "great questions" of modern cosmology, like General Relativity validity (including Dark Matter and Dark Energy behavior), formation and evolution of structure like proto-galaxies, and planetary systems formation in bio compatibles environments. We describe three principle demonstration tests designed to address some of the potential showstoppers for high astrometric precision experiments. The three tests are focused on the key concepts of multiple fields telescopes, astrometric metrology and very fine sub-pixel precision (goal: < 1/2000 pixel) in white light.

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“…A specific application for Fundamental Physics, with the addition of a custom coronagraphic system, is represented by the current Astrometric Gravitation Probe design. 18…”

Section: Introductionmentioning

confidence: 99%

The ASTRA project: a doorway to future astrometry

Gai

Lattanzi

et al. 2020

Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV

Self Cite

View full text Add to dashboard Cite

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Pinpointing gravitational waves via astrometric gravitational wave antennas

Crosta,

Lattanzi,

Le Poncin-Lafitte

et al. 2024

Sci Rep

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The direct detection of gravitational waves by ground-based optical interferometers has opened a new window in astronomy. Besides, the sensitivity of these linear detectors to the direction of arrival of an incoming gravitational wave is limited compared to current prospects of high-precision, space-based, astrometry. Indeed, advanced methods of differential relativistic astrometry offer a unique opportunity to overcome that situation. Here, we present a novel concept for a gravitational wave antenna that uses angles between close pairs of point-like sources as natural (angular) “arms” to characterise the very tiny variations in angular separations induced by a passing gravitational wave. The proposed new astrometric gravitational wave observable proves to be a powerful tool to substantially enhance the effect of gravitational waves of different strengths by exploiting optical resolution to the fullest. Then, by optically multiplexing three (or more) of such astrometric “arms”, it would be also possible to pinpoint source directions to unprecedented levels.

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RAFTER: Ring Astrometric Field Telescope for Exo-planets and Relativity

Riva

Gai

Vecchiato

et al. 2020

Space Telescopes and Instrumentation 2020: Optical, Infrared, and Millimeter Wave

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High precision astrometry aims at source position determination to a very small fraction of the diffraction image size, in high SNR regime. One of the key limitations to such goal is the optical response variation of the telescope over a sizeable FOV, required to ensure bright reference objects to any selected target. The issue translates into severe calibration constraints, and/or the need for complex telescope and focal plane metrology. We propose an innovative system approach derived from the established TMA telescope concept, extended to achieve high filling factor of an annular field of view around the optical axis of the telescope. The proposed design is a very compact, 1 m class telescope compatible with modern CCD and CMOS detectors (EFL = 15 m). We describe the concept implementation guidelines and the optical performance of the current optical design. The diffraction limited FOV exceeds 1.25 square degrees, and the detector occupies the best 0.25 square degree with 66 devices.

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Progress on the Astrometric Gravitation Probe design

Cited by 4 publications

References 14 publications

The ASTRA project: a doorway to future astrometry

The ASTRA project: a doorway to future astrometry

Pinpointing gravitational waves via astrometric gravitational wave antennas

RAFTER: Ring Astrometric Field Telescope for Exo-planets and Relativity

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