General relativistic effects on the orbit of the S2 star with GRAVITY

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Table 1

Astrometric and spectroscopic accuracies of various current and future instruments, capable of observing in the near infrared.

Astrometry

NACO^a (VLT): ~300 μas

GRAVITY (VLT): ~10 μas

MICADO^b (E-ELT): 50−100μas

TMT^c: ~100 μas

GMT^d: ~100 μas

Spectroscopy

NIRSPEC^e (Keck): ~10 km s^-1

GRAVITY (VLT): ≳100 km s^-1

MICADO (E-ELT): ~1 km s^-1

SINFONI^f (VLT): ~10 km s^-1

Notes. The instruments NACO, GRAVITY, NIRSPEC and SINFONI are already in use. The other instruments are supposed to be operational in 2020−2025.

^(a)

Nasmyth adaptive optics system (NAOS) Near-infrared imager and spectrograph (CONICA).

^(b)

Multi-AO imaging camera for deep observations.

^(c)

Thirty meter telescope.

^(d)

Giant Magellan telescope.

^(e)

Near infrared echelle spectrograph.

^(f)

Spectrograph for integral field observations in the near infrared.

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