Jon Miller

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We have detected, at x-ray and radio wavelengths, large-scale moving jets from the microquasar XTE J1550-564. Plasma ejected from near the black hole traveled at relativistic velocities for at least 4 years. We present direct evidence for gradual deceleration in a relativistic jet. The broadband spectrum of the jets is consistent with synchrotron emission(More)
The properties of the orbit and the donor star in the high mass X-ray binary microquasar LS 5039 indicate that accretion processes should mainly occur via a radiatively driven wind. In such a scenario, significant X-ray variability would be expected due to the eccentricity of the orbit. The source has been observed at X-rays by several missions, although(More)
We compared the efficacy of a simple virtual environment (VE) training system with two media more commonly used to train people: paper and video tutorials. Participants learned how to solve a spatial puzzle in one of the three training media. People who trained with the VE spent more time training, however they performed significantly better than people in(More)
We present Chandra and XMM–Newton X-ray observations that monitor the neutron star cooling of the quasi-persistent neutron star X-ray transients KS 1731−260 and MXB 1659−29 for approximately 4 yr after these sources returned to quiescence from prolonged outbursts. In both sources the outbursts were long enough to significantly heat the neutron star crust(More)
While iron emission lines are well studied in black hole systems, both in X-ray binaries and Active Galactic Nuclei, there has been less of a focus on these lines in neutron star low-mass X-ray binaries (LMXBs). However , recent observations with Suzaku and XMM-Newton have revealed broad asymmetric iron line profiles in 4 neutron star LMXBs, confirming an(More)
We report on several pointed Rossi X-ray Timing Explorer observations of the enigmatic low-mass X-ray binary (LMXB) 4U 1957+11 at different X-ray luminosities. The luminosity of the source varied by more than a factor of four on time scales of months to years. The spectrum of the source tends to get harder when its luminos-ity increases. Only very weak(More)
Using Suzaku observations of three neutron star low-mass X-ray binaries (Ser X−1, 4U 1820−30 and GX 349+2) we have found broad, asymmetric, relativistic Fe K emission lines in all three objects. These Fe K lines can be well fit by a model for lines from a relativistic accretion disk ('diskline'), allowing a measurement of the inner radius of the accretion(More)
We present a variability study of the black hole candidate and X-ray transient H1743–332 during its 2003/2004 outburst. We analyzed five Rossi X-ray Timing Explorer observations that were performed as part of a multi-wavelength campaign, as well as six observations from the early rise of the outburst. The source was observed in several black hole states and(More)
  • David Pooley, Walter H G Lewin, Lee Homer, Frank Verbunt, Scott F Anderson, Bryan M Gaensler +6 others
  • 2002
We report on the Chandra X-ray Observatory ACIS-S3 imaging observation of the globular cluster NGC 6752. We detect 6 X-ray sources within the 10. ′′ 5 core radius and 13 more within the 115 ′′ half-mass radius down to a limiting luminosity of L x ≈ 10 30 erg s −1 for cluster sources. We reanalyze archival data from the Hubble Space Telescope and the(More)
After almost 2.5 years of actively accreting, the neutron star X-ray transient and eclipsing binary MXB 1659–29 returned to quiescence in 2001 September. We report on a Chandra observation of this source taken a little over a month after this transition. The source was detected at an unabsorbed 0.5–10 keV flux of only (2.7 − 3.6) × 10 −13 erg cm −2 s −1 ,(More)