Refining Chandra/ACIS Subpixel Event Repositioning Using a Backside Illuminated CCD Model

Kavli Affiliate: Gregory Y. Prigozhin | First 5 Authors: Jingqiang Li, Joel H. Kastner, Gregory Y. Prigozhin, Norbert S. Schulz, | Summary: Subpixel event repositioning (SER) techniques have been demonstrated to significantly improve the already unprecedented spatial resolution of Chandra X-ray imaging with the Advanced CCD Imaging Spectrometer (ACIS). Chandra CCD SER techniques are based […]


Continue.. Refining Chandra/ACIS Subpixel Event Repositioning Using a Backside Illuminated CCD Model

XMM-Newton observations of PSR B1823-13: An asymmetric synchrotron nebula around a Vela-like pulsar

Kavli Affiliate: Norbert Schulz | First 5 Authors: Bryan Gaensler, Norbert Schulz, Vicky Kaspi, Michael Pivovaroff, Werner Becker | Summary: We present a deep observation with the X-ray Multi-Mirror Mission of PSR B1823-13, a young pulsar with similar properties to the Vela pulsar. We detect two components to the X-ray emission associated with PSR B1823-13: […]


Continue.. XMM-Newton observations of PSR B1823-13: An asymmetric synchrotron nebula around a Vela-like pulsar

The effect of bandpass uncertainties on component separation

Kavli Affiliate: Sarah Church | First 5 Authors: Sarah Church, Lloyd Knox, Martin White, , | Summary: Multi-frequency measurements of the microwave sky can be decomposed into maps of distinct physical components such as the cosmic microwave background (CMB) and the Sunyaev-Zel’dovich (SZ) effect. Each of the multi–frequency measurements is a convolution of the spectrum […]


Continue.. The effect of bandpass uncertainties on component separation

The Flight Spectral Response of the ACIS Instrument

Kavli Affiliate: Catherine E. Grant | First 5 Authors: Paul P. Plucinsky, Norbert S. Schulz, Herman L. Marshall, Catherine E. Grant, George Chartas | Summary: We discuss the flight calibration of the spectral response of the Advanced CCD Imaging Spectrometer (ACIS) on-board the Chandra X-ray Observatory (CXO). The spectral resolution and sensitivity of the ACIS […]


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Sacrificial charge and the spectral resolution performance of the Chandra Advanced CCD Imaging Spectrometer

Kavli Affiliate: Catherine E. Grant | First 5 Authors: Catherine E. Grant, Gregory Y. Prigozhin, Beverly LaMarr, Mark W. Bautz, | Summary: Soon after launch, the Advanced CCD Imaging Spectrometer (ACIS), one of the focal plane instruments on the Chandra X-ray Observatory, suffered radiation damage from exposure to soft protons during passages through the Earth’s […]


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Monitoring the Health and Safety of the ACIS Instrument On-Board the Chandra X-ray Observatory

Kavli Affiliate: Peter G. Ford | First 5 Authors: Shanil N. Virani, Peter G. Ford, Joseph M. DePasquale, Paul P. Plucinsky, | Summary: The Chandra X-ray Observatory (CXO), NASA’s latest “Great Observatory”, was launched on July 23, 1999 and reached its final orbit on August 7, 1999. The CXO is in a highly elliptical orbit, […]


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Potential of Mean Force between a Spherical Particle Suspended in a Nematic Liquid Crystal and a Substrate

Kavli Affiliate: Nicholas L. Abbott | First 5 Authors: Evelina B. Kim, Roland Faller, Qiliang Yan, Nicholas L. Abbott, Juan J. de Pablo | Summary: We consider a system where a spherical particle is suspended in a nematic liquid crystal confined between two walls. We calculate the liquid-crystal mediated potential of mean force between the […]


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Discovery of a High-Latitude Accreting Millisecond Pulsar in an Ultracompact Binary

Kavli Affiliate: Edward Morgan | First 5 Authors: Duncan Galloway, Deepto Chakrabarty, Edward Morgan, Ronald Remillard, | Summary: We have identified the third known accretion-powered millisecond pulsar, XTE J0929-314, with the Rossi X-Ray Timing Explorer. The source is a faint, high-Galactic-latitude X-ray transient (d >~ 5 kpc) that was in outburst during 2002 April-June. The […]


Continue.. Discovery of a High-Latitude Accreting Millisecond Pulsar in an Ultracompact Binary