Volume 481, Number 3, April III 2008
|Page(s)||919 - 921|
|Published online||18 February 2008|
Soft X-ray in-flight calibration of the ROSAT PSPC*
Institut für Astrophysik, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany e-mail: email@example.com
Accepted: 6 February 2008
Methods. We derive an absolute flux calibration of the PSPC using the accurately known soft X-ray spectrum of HZ43. Corrections to the PSPC response matrix are derived from a comparison of predicted and observed PSPC spectra of HZ43, supplemented by results for AM Her.
Results. The calibration of the PSPC for photon energies keV is found to be accurate to better than 5% refuting earlier reports of a major miscalibration. Our corrections to the detector response matrices remove systematic residuals in the pulse height spectra of soft sources.
Key words: methods: data analysis / stars: individual: HZ43 / stars: individual: AM Her / X-rays: stars
© ESO, 2008
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