... centre

Based on observations at the Very Large Telescope (VLT) of the European Southern Observatory (ESO), Cerro Paranal, Chile.

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...2005)

See also the electronic manual of the public Gemini North Galactic Center Demonstration Science Data Set for an application on GC imaging data.

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...DPUSER

Developed by Thomas Ott; http://www.mpe.mpg.de/~ott/dpuser/history.html

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... east

Where atan2 is the quadrant-preserving arctangent.

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... bias-corrected

Velocity squares are limited to values $\ge$0. Therefore the statistical velocity errors systematically shift the results towards higher values.

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... distributions

In this discussion, we assume a constant mass-to-light ratio.

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... 

Wolfram Research, Inc., Champaign, IL, USA.

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... Sgr A*

Because SINFONI's AO guide star is located $\approx$17'' north of Sgr A*.

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...$\sigma$ error

Even if a star does not show significant acceleration, a parabolic fit finds a (usually non-zero) result for the 2nd-order term and a corresponding fit error. These values we use here.

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