David Mark Russell

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Following the detection of renewed activity in H1743-322 with Swift/BAT (Krimm et al., ATEL #2058 <http://www.astronomerstelegram.org/?read=2058>), we triggered radio observations of the source using the VLA. Observations were taken on 2009 May 27 (0855-0915 UT) at 8.4 GHz, with the array in its CnB configuration. The source was detected at a level of 2.24(More)
This paper presents the development of a new set of magnitude, phase, and comprehensive error measures. These error measures can be used to evaluate the differences between two general functions, or test and analytical data, by providing a robust means for quantifying the difference in magnitude, the phasing, and overall error between the functions. The(More)
Black holes undergoing accretion are thought to emit the bulk of their power in the X-ray band by releasing the gravitational potential energy of the infalling matter. At the same time, they are capable of producing highly collimated jets of energy and particles flowing out of the system with relativistic velocities. Here we show that the 10-solar-mass(More)
The ability to monitor tissue oxygen concentration in a specific region of the brain in a freely moving animal could provide a new paradigm in neuroscience research. We have developed a fully implantable telemetry system for the continuous and chronic recording of brain tissue oxygen (PO(2,BR)) in conscious animals. A telemetry system with a sampling rate(More)
We report the discovery of a new hysteresis effect in black hole X-ray binary state transitions, that of the near-infrared (NIR) flux (which most likely originates in the jets) versus X-ray flux. We find, looking at existing data sets, that the infrared emission of black hole X-ray transients appears to be weaker in the low/hard state rise of an outburst(More)