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The orbit of the star S2 around SgrA* from VLT and Keck data
S. Gillessen, F. Eisenhauer, T. K. Fritz +5
Two recent papers (Ghez et al. 2008, Gillessen et al. 2009) have estimated the mass of and the distance to the massive black hole in the center of the Milky Way using stellar orbit…
Soft gamma-ray constraints on a bright flare from the Galactic Center supermassive black hole
G. Trap, A. Goldwurm, R. Terrier +11
Sagittarius A* (Sgr A*) is the supermassive black hole residing at the center of the Milky Way. It has been the main target of an extensive multiwavelength campaign we carried out…
What is limiting near-infrared astrometry in the Galactic Center?
Tobias K. Fritz, Stefan Gillessen, Sascha Trippe +7
We systematically investigate the error sources for high-precision astrometry from adaptive optics based near-infrared imaging data. We focus on the application in the crowded stel…
An Extremely Top-Heavy IMF in the Galactic Center Stellar Disks
H. Bartko, F. Martins, S. Trippe +19
We present new observations of the nuclear star cluster in the central parsec of the Galaxy with the adaptive optics assisted, integral field spectrograph SINFONI on the ESO/VLT. O…
Simultaneous Multi-Wavelength Observations of Sgr A* during 2007 April 1-11
F. Yusef-Zadeh, H. Bushouse, M. Wardle +18
We report the detection of variable emission from Sgr A* in almost all wavelength bands (i.e. centimeter, millimeter, submillimeter, near-IR and X-rays) during a multi-wavelength o…
Evidence for X-ray synchrotron emission from simultaneous mid-IR to X-ray observations of a strong Sgr A* flare
K. Dodds-Eden, D. Porquet, G. Trap +22
This paper reports measurements of Sgr A* made with NACO in L' -band (3.80 um), Ks-band (2.12 um) and H-band (1.66 um) and with VISIR in N-band (11.88 um) at the ESO VLT, as well a…