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Advanced CCD imaging spectrometer (ACIS) instrument on the Chandra X-ray Observatory
The ACIS instrument has been operating for three years in orbit, producing high quality scientific data on a wide variety of X-ray emitting astronomical objects. Except for a brief period at the veryExpand
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Determination of Confidence Limits for Experiments with Low Numbers of Counts
Two different methods, classical and Bayesian, for determining confidence intervals involving Poisson-distributed data are compared. Particular consideration is given to cases where the number ofExpand
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Evidence for a canonical gamma-ray burst afterglow light curve in the Swift XRT data
We present new observations of the early X-ray afterglows of the first 27 gamma-ray bursts (GRBs) well observed by the Swift X-Ray Telescope (XRT). The early X-ray afterglows show a canonicalExpand
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Readout modes and automated operation of the Swift X-ray Telescope
The Swift X-ray Telescope (XRT) is designed to make astrometric, spectroscopic, and photometric observations of X-ray emission from Gamma-ray Bursts and their afterglows in the energy band 0.2-10Expand
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SWIFT XRT point spread function measured at the Panter end-to-end tests
The SWIFT X-ray Telescope (XRT) is designed to make astrometric, spectroscopic and photometric observations of the X-ray emission from Gamma-ray bursts and their afterglows, in the energy band 0.2 -Expand
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High-Resolution X-Ray Spectroscopy and Modeling of the Absorbing and Emitting Outflow in NGC 3783
The high-resolution X-ray spectrum of NGC 3783 shows several dozen absorption lines and a few emission lines from the H-like and He-like ions of O, Ne, Mg, Si, and S, as well as from Fe XVII-Fe XXIIIExpand
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Nucleosynthesis in the Oxygen-rich Supernova Remnant G292.0+1.8 from Chandra X-Ray Spectroscopy
We continue our analysis of the Galactic oxygen-rich supernova remnant (SNR) G292.0+1.8, which was observed with the Chandra X-Ray Observatory. The high angular resolution Chandra data resolveExpand
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X-Ray Properties of the Northern Galactic Cap Sources in the 58 Month Swift/BAT Catalog
We present a detailed X-ray spectral analysis of the non-beamed, hard X-ray selected active galactic nuclei (AGNs) in the northern Galactic cap of the 58 month Swift Burst Alert Telescope (Swift/BAT)Expand
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The X-Ray Remnant of SN 1987A
We present high-resolution Chandra observations of the remnant of SN 1987A in the Large Magellanic Cloud. The high angular resolution of the Chandra X-Ray Observatory permits us to resolve the X-rayExpand
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The structure of the oxygen-rich supernova remnant G292.0 + 1.8 from Chandra X-ray images: Shocked ejecta and circumstellar medium
We present results from the observation of the young Galactic supernova remnant (SNR) G292.0+1.8 with the Advanced CCD Imaging Spectrometer (ACIS) on board the Chandra X-Ray Observatory. In the 0.3-8Expand
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