Jon M. Miller

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We have analyzed an XMM-Newton observation of the nearby spiral galaxy NGC 1313, which contains two “ultraluminous” X-ray (ULX) sources. We measure isotropic luminosities of ergs s 1 and 40 L p 2.0 # 10 X ergs s 1 for NGC 1313 X-1 and X-2 (0.2–10.0 keV, assuming a distance of 3.7 Mpc). The 39 L p 6.6 # 10 X spectra statistically require soft and hard(More)
Inspection is widely believed to be the most cost-effective method for detecting defects in documents produced during the software lifecycle. However, it is by its very nature a labour intensive process. This has led to work on computer support for the process which should increase the efficiency and effectiveness beyond what is currently possible with a(More)
The Nuclear Spectroscopic Telescope Array (NuSTAR) mission, launched on 13 June 2012, is the first focusing high-energy X-ray telescope in orbit. NuSTAR operates in the band from 3 – 79 keV, extending the sensitivity of focusing far beyond the ∼10 keV high-energy cutoff achieved by all previous X-ray satellites. The inherently low-background associated with(More)
Since the 1995 discovery of the broad iron K-line emission from the Seyfert galaxy MCG-6-30-15 (ref. 1), broad iron K lines have been found in emission from several other Seyfert galaxies, from accreting stellar-mass black holes and even from accreting neutron stars. The iron K line is prominent in the reflection spectrum created by the hard-X-ray continuum(More)
Aims. A transient astrophysical event observed in both gravitational wave (GW) and electromagnetic (EM) channels would yield rich scientific rewards. A first program initiating EM follow-ups to possible transient GW events has been developed and exercised by the LIGO and Virgo community in association with several partners. In this paper, we describe and(More)
Cool thermal emission components have recently been revealed in the X-ray spectra of a small number of ultraluminous X-ray sources (ULXs) with ergs s 1 in nearby galaxies. These components can be well 40 L ≥ 10 X fitted with accretion disk models, with temperatures approximately 5–10 times lower than disk temperatures measured in stellar-mass Galactic black(More)
We present the results of the timing and color analysis of more than two hundred RXTE/PCA observations of the bright black-hole transient GX 339–4 obtained during its 2002/2003 outburst. The color-intensity evolution of the system, coupled to the properties of its fast time variability, allow the identification of four separate states. Depending on the(More)
We present a study of the X-ray transient and black hole candidate XTE J1650–500 during its 2001/2002 outburst. The source made two state transitions between the hard and soft states, at luminosity levels that differed by a factor of ∼5–10. The first transition, between hard and soft, lasted for ∼30 days and showed two parts; one part in which the spectral(More)