Chandra X-Ray Spectral Analysis
The Chandra COSMOS-Legacy Survey: Source X-Ray Spectral Properties
... 4. SPECTRAL FITTING The spectral fitting was performed using the CIAO modeling and fitting package SHERPA (Freeman et ...count spectral fitting, since in principle it does not require count binning to ...
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The unusual broad-band X-ray spectral variability of NGC 1313 X-1 seen with XMM–Newton, Chandra, and NuSTAR.
... 1313 X-1 showing strong flux and spectral evolution across the simultaneous XMM–Newton + NuSTAR expo- sure (see ...notable spectral variability within any of the individual ...full Chandra ...
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Spectral analysis of the Chandra comet survey
... Cometary X-ray emission arises from collisions between bare- and H-like ions (such as C, N, O, Ne, ...Cometary X-ray spectra hence reflect the state of the solar ...
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A Chandra X-Ray study of the dense globular cluster Terzan 5
... Sherpa spectral fitting of source and background simultaneously gives results within the errors of our XSPEC analysis where we are able to use the same models, but note that these low signal-to-noise ...
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Resolving the unresolved cosmic X-ray background in the Chandra Deep Fields
... our spectral extraction regions have HST or IRAC counterparts, except for 2–4 of the 80–90 MIPS sources, and 1 of the 6 VLA sources, so we do not include these data in the ...
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X-ray spectral variability of Seyfert 2 galaxies
... the X-ray variability of di fferent families of ...from Chandra and /or XMM-Newton public archives at di fferent epochs, with timescales ranging from a few hours to ...the analysis of the light ...
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Spectral Evolution of the Ultraluminous X-Ray Sources M82 X-1 and X-2
... Ultraluminous X-ray sources (ULXs). X-1, an intermediate-mass black hole (IMBH) candidate, and X-2, an ultraluminous X-ray pulsar ...broadband X-ray spectral ...
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Spectral Evolution of the Ultraluminous X-Ray Sources M82 X-1 and X-2
... and X-2 using 10 simultaneous Chandra and NuSTAR ...The Chandra data allowed us to spatially resolve the sources, separated by only 5 ″, while the NuSTAR data allowed a broadband X-ray ...
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Piercing through Highly Obscured and Compton-thick AGNs in the Chandra Deep Fields. I. X-Ray Spectral and Long-term Variability Analyses
... only one source shows a significant change in the re- flection component, and the soft excess fluxes remain constant for all sources. 3. For those sources with a weak and constant reflec- tion component confirmed in the ...
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Broadband X-ray Spectral Analysis of the Double-Nucleus Luminous Infrared Galaxy Mrk 463
... with Chandra, supported by the Chandra X-ray Observatory Center, which is operated by the Smithsonian Astrophysical Ob- servatory for and on behalf of ...
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First Hard X-ray Observation of a Compact Symmetric Object : A Broadband X-ray Study of a radio galaxy OQ+208 with NuSTAR and Chandra
... — X-rays: galaxies ...the X-ray data currently available for the young radio sources is still rather poor, as these sources are often faint and require long Chandra and XMM- Newton integration ...
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The Chandra X-ray Observatory. Jonathan McDowell, Chandra X-ray Center
... Best X-ray images before Chandra (ROSAT). Chandra images[r] ...
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The Swift X-ray Telescope Cluster Survey II. X-ray spectral analysis
... Our spectral fits with a single mekal model provide also a mea- surement of the observed flux and the rest-frame luminosity, whose values are only marginally affected by the ∼ 10% cor- rection on the best-fit ...
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First Terrestrial Soft X-ray Auroral Observation by The Chandra X-ray Observatory
... the X-ray ...the X-ray production to be very ...predicted X-ray bremsstrahlung, we conclude that the double exponential fit can be used to represent the electron measurements ...
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A Chandra X‐Ray Study of the Globular Cluster M80
... sources, so we do not make exposure corrections to the observed counts. We extracted counts from a large source- free adjacent background region to estimate the back- ground flux, finding 0.019 counts pixel 1 in the ...
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The software development process at the Chandra X-ray Center
... the X-ray Calibration Facility (XRCF) in Huntsville, Alabama, 2 years prior to ...an X-ray mission, and the only test data available prior to the start of calibration were stand-alone ...
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X-ray spectral states and metallicity of Ultra Luminous X-ray sources: a deeper insight into their spectral properties
... mass X-ray binary (LMXB), where material residing in the outer disc obscures our view to the inner regions (White & Swank 1982; White et ...the spectral parameters, and we by-passed this issue ...
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The X-ray spectral evolution of the ultraluminous X-ray source Holmberg IX X-1.
... overall spectral shape in terms of physical ...IX X-1 is viewed close to face on, and a relative lack of variability below 1 keV, compared to above, is not expected for a pure disc ...the spectral ...
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The X-ray spectral evolution of the ultraluminous X-ray source Holmberg IX X-1
... The analysis in this paper adds to the growing body of evidence that many ULXs are likely to be sMBHs accreting at super-Eddington rates, where their observational prop- erties can be explained by the distinct ...
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X-ray Populations in The Local Group: Insights with Hubble & Chandra
... extrasolar X-ray source, Sco X-1, our understanding of these enigmatic sources known as XRBs has moved at a rapid ...pace. Chandra observations, due to their superior angular resolution, have ...
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