Based on observations with INTEGRAL, an ESA project with an instrument and science data center funded by ESA member states (especially the PI countries: Denmark, France, Germany, Italy, Switzerland, Spain), The Czech Republic, and Poland, and with the participation of Russia and the USA.

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EGRET gamma-ray background map, HI and CO data were obtained from Skyview (http://skyview.gsfc.nasa.gov/) facility supplied by NASA/GSFC.

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... area

We would like to note that for the near-infrared spectral band, the mass-to-light ratio was found to be different within central 30 pc around Sgr A^* and in the rest of the Galaxy, see, e.g., Launhardt et al. (2002).

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