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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…
The Event Horizon Telescope: exploring strong gravity and accretion physics
Angelo Ricarte, Jason Dexter
The Event Horizon Telescope (EHT), a global sub-millimeter wavelength very long baseline interferometry array, is now resolving the innermost regions around the supermassive black…
NuSTAR detection of high-energy X-ray emission and rapid variability from Sagittarius A* flares
Nicolas M. Barrière, John A. Tomsick, Frederick K. Baganoff +13
Sagittarius A* harbors the supermassive black hole that lies at the dynamical center of our Galaxy. Sagittarius A* spends most of its time in a low luminosity emission state but fl…
Evidence for Large Temperature Fluctuations in Quasar Accretion Disks From Spectral Variability
John J. Ruan, Scott F. Anderson, Jason Dexter +1
The well-known bluer-when-brighter trend observed in quasar variability is a signature of the complex processes in the accretion disk, and can be a probe of the quasar variability…