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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 - PowerPoint PPT Presentation
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Vadim Burwitz EPIC Calibration Meeting, October 27, 2006 Vadim Burwitz EPIC Calibration Meeting, October 27, 2006
Further work on cross-calibrationresults obtained from observations
of the INS RX J1856RX J1856, and theWDs HZ 43HZ 43 and Sirius BSirius B
Vadim Burwitz
EPIC Calibration Meeting October 2006, Mallorca
Vadim Burwitz EPIC Calibration Meeting, October 27, 2006 Vadim Burwitz EPIC Calibration Meeting, October 27, 2006
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 27, 2006 Vadim Burwitz EPIC Calibration Meeting, October 27, 2006
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 PSPC
K. Beuermann, V. Burwitz and T. Rauch
The Paper published: 2006 A&A 458, 541
Vadim Burwitz EPIC Calibration Meeting, October 27, 2006 Vadim Burwitz EPIC Calibration Meeting, October 27, 2006
NLTE pure H model spectrum of HZ43
Vadim Burwitz EPIC Calibration Meeting, October 27, 2006 Vadim Burwitz EPIC Calibration Meeting, October 27, 2006
HZ43 temperature vs. gravity
Vadim Burwitz EPIC Calibration Meeting, October 27, 2006 Vadim Burwitz EPIC Calibration Meeting, October 27, 2006
RX J1856-37 two temperature bb fit
Vadim Burwitz EPIC Calibration Meeting, October 27, 2006 Vadim Burwitz EPIC Calibration Meeting, October 27, 2006
RX J1856-37 two temperature bb fit
Vadim Burwitz EPIC Calibration Meeting, October 27, 2006 Vadim Burwitz EPIC Calibration Meeting, October 27, 2006
Simultaneous fit to RXJ1856 and the WDs
Vadim Burwitz EPIC Calibration Meeting, October 27, 2006 Vadim Burwitz EPIC Calibration Meeting, October 27, 2006
Parameters obtained from fit
Vadim Burwitz EPIC Calibration Meeting, October 27, 2006 Vadim Burwitz EPIC Calibration Meeting, October 27, 2006
Comparison of photon spectra
EUVE
Vadim Burwitz EPIC Calibration Meeting, October 27, 2006 Vadim Burwitz EPIC Calibration Meeting, October 27, 2006
RX J1856.5–3754: A `stable‘ neutron star
Individual fits
with
all parameters
free:
Simu
ltaneous fits
with
NH lin
ked:
Model:tbabs*bbody
from Frank Haberl