Other
Scientific paper
Sep 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..372..221b&link_type=abstract
15th European Workshop on White Dwarfs ASP Conference Series, Vol. 372, proceedings of the conference held 7-11 August, 2006 in
Other
Scientific paper
The absolute calibration of space-borne instruments in the soft X-ray regime rests strongly on model spectra of hot white dwarfs.
We analyze the Chandra LETG+HRC observations of the white dwarfs HZ 43 A and Sirius B and of the neutron star RX J185635-3754 in order to resolve current uncertainties in their soft X-ray spectral fluxes and photospheric parameters.
Our improved parameters fit the observations from the optical to the soft X-ray regime. We report the absolute spectral fluxes of the three stars at selected wavelengths and provide corrections to the effective areas of the Chandra LETG+HRC, the EUVE short-wavelength spectrometer, and the ROSAT PSPC. The results may aid the calibration of other space-borne instruments.
Beuermann Klaus
Burwitz Vadim
Rauch Thomas
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