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The X-ray Flux Distribution of Sagittarius A* as Seen by Chandra
J. Neilsen, S. Markoff, M. A. Nowak +11
We present a statistical analysis of the X-ray flux distribution of Sgr A* from the Chandra X-ray Observatory's 3 Ms Sgr A* X-ray Visionary Project (XVP) in 2012. Our analysis indi…
Polarized light from Sgr A* in the near-infrared -band
B. Shahzamanian, A. Eckart, M. Valencia-S. +13
We present a statistical analysis of polarized near-infrared (NIR) light from Sgr A*, the radio source associated with the supermassive black hole at the center of the Milky Way. T…
Detection of Galactic Center source G2 at 3.8 m during periapse passage
Gunther Witzel, Andrea M. Ghez, Mark R. Morris +14
We report new observations of the Galactic Center source G2 from the W. M. Keck Observatory. G2 is a dusty red object associated with gas that shows tidal interactions as it nears…
Spitzer/IRAC Observations of the Variability of Sgr A* and the Object G2 at 4.5 microns
J. L. Hora, G. Witzel, M. L. N. Ashby +9
We present the first detection from the Spitzer Space Telescope of 4.5 micron variability from Sgr A*, the emitting source associated with the Milky Way's central black hole. The >…
The Intrinsic Two-Dimensional Size of Sagittarius A*
Geoffrey C. Bower, Sera Markoff, Andreas Brunthaler +9
We report the detection of the two-dimensional structure of the radio source associated with the Galactic Center black hole, Sagittarius A*, obtained from Very Long Baseline Array…
A formal method for identifying distinct states of variability in time-varying sources: SgrA* as an example
L. Meyer, G. Witzel, F. A. Longstaff +1
Continuously time variable sources are often characterized by their power spectral density and flux distribution. These quantities can undergo dramatic changes over time if the und…