SIMBAD references

The Galactic Center has been observed with the ROSAT-PSPC for 50000sec. 15 sources were found within the central 30'x30', field. 1E1742.5-2859, the source commonly associated with Sgr A*, could be resolved into three individual objects, out of which at least one is a foreground object. One component of the 1E1742.5-2859 complex is coincident with Sgr A* within less than 10". This makes it to be likely the nucleus itself or a source in its immediate vicinity. The flux derived from the ROSAT observation is much less than one would expect on the basis of previous measurements at higher energies. In order to explain this discrepancy, we assume an X-ray absorption much excess of N_H=5x10²²cm^–2, the expected value for the interstellar absorption towards the Galactic Center. There is an indication that at least a part of the apparently diffuse emission can be resolved into individual sources.