Further work on cross-calibration
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Vadim Burwitz EPIC Calibration Meeting October 2006, Mallorca PowerPoint PPT Presentation


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Further work on cross-calibration results obtained from observations of the INS RX J1856 , and the WDs HZ 43 and Sirius B. Vadim Burwitz EPIC Calibration Meeting October 2006, Mallorca. Overview. Paper on this topic published in 2006 A&A 458, 541 Absolute Calibration Soft X-rays

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Vadim Burwitz EPIC Calibration Meeting October 2006, Mallorca

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Vadim burwitz epic calibration meeting october 2006 mallorca

Further work on cross-calibrationresults obtained from observations of the INS RX J1856, and theWDs HZ 43 and Sirius B

Vadim Burwitz

EPIC Calibration Meeting October 2006, Mallorca


Overview

Overview

  • Paper on this topic published in 2006 A&A 458, 541

  • Absolute Calibration Soft X-rays

     dependant on model spectra of WDs

    what models to use?, uncertainties?

  • Analyse LETG + HRC-S data HZ 43A, Sirius B and RX J1856.5-3754

     determine spectral parameters

     improve effective area.

  • Compare obtained photon spectra with EUVE and ROSAT

    and XMM (work together with Frank Haberl)


Vadim burwitz epic calibration meeting october 2006 mallorca

The Paper published: 2006 A&A 458, 541

Establishing HZ43 A, Sirius B, and RX J185635-3754 as soft X-ray standards: a cross-calibration between the Chandra LETG+HRC-S, the EUVE spectrometer, and the ROSAT PSPCK. Beuermann, V. Burwitz and T. Rauch


Nlte pure h model spectrum of hz43

NLTE pure H model spectrum of HZ43


Hz43 temperature vs gravity

HZ43 temperature vs. gravity


Rx j1856 37 two temperature bb fit

RX J1856-37 two temperature bb fit


Rx j1856 37 two temperature bb fit1

RX J1856-37 two temperature bb fit


Simultaneous fit to rxj1856 and the wds

Simultaneous fit to RXJ1856 and the WDs


Parameters obtained from fit

Parameters obtained from fit


Comparison of photon spectra

EUVE

Comparison of photon spectra


Rx j1856 5 3754 a stable neutron star

RX J1856.5–3754: A `stable‘ neutron star

Individual fits with

all parameters free:

Simultaneous fits with

NH linked:

Model:

tbabs*bbody

from Frank Haberl


Summary

Summary


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