Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856 HZ 43Sirius B Cross-calibration results from observations of the INS RX J1856, and the WDs HZ 43 and Sirius B Vadim Burwitz EPIC CAL/OPS May , MPE
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Overview 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 J determine spectral parameters improve effective area. Compare obtained photon spectra with EUVE and ROSAT and XMM (work by Frank Haberl)
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Overview
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 NLTE pure H model spectrum of HZ43 Different bound-free and free-free absorption coefficients -- Seaton -- Karzas & Latter
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 NLTE pure H model spectrum of HZ43
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 HZ43 temperature vs. gravity
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 HZ43 temperature vs. gravity
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J two temperature bb fit
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J two temperature bb fit
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Simultaneous fit to RXJ1856 and the WDs
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Simultaneous fit to RXJ1856 and the WDs
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 LETG + HRC-S effective areas
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Parameters obtained from fit
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Parameters obtained from fit
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Comparison of photon spectra EUVE
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Comparison of photon spectra EUVE
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 RX J1856.5–3754: A `stable‘ neutron star Individual fits withall parameters free: Simultaneous fits withN H linked: Model: tbabs*bbody from Frank Haberl
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Summary
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 HZ 43 residuals
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Comparison Chandra LETGS and EUVE
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 Comparison WD models with ROSAT
Vadim Burwitz EPIC CAL/OPS, MPE May 4, 2006 LETGS long-term lightcurve of HZ43