MONITORING STELLAR ORBITS AROUND THE MASSIVE BLACK HOLE IN THE GALACTIC CENTER

@article{Gillessen2009MONITORINGSO,
  title={MONITORING STELLAR ORBITS AROUND THE MASSIVE BLACK HOLE IN THE GALACTIC CENTER},
  author={Stefan Gillessen and Frank Eisenhauer and Sascha Trippe and Tal Alexander and Reinhard Genzel and Fabrice Martins and Thomas Ott},
  journal={The Astrophysical Journal},
  year={2009},
  volume={692},
  pages={1075 - 1109}
}
We present the results of 16 years of monitoring stellar orbits around the massive black hole in the center of the Milky Way, using high-resolution near-infrared techniques. This work refines our previous analysis mainly by greatly improving the definition of the coordinate system, which reaches a long-term astrometric accuracy of ≈300 μas, and by investigating in detail the individual systematic error contributions. The combination of a long-time baseline and the excellent astrometric accuracy… 

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