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ROSAT PSPC spectra of six Seyfert 1 galaxies |
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| Authors: | T J Turner I M George R F Mushotzky |
| Institution: | * Code 668, Laboratory for High Energy Astrophysics, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA a Universities Space Research Association, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA ** Code 666, Laboratory for High Energy Astrophysics, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA |
| Abstract: | We present six ROSAT PSPC observations of Seyfert 1 galaxies chosen to have low Galactic line-of-sight absorption (NH  1020 cm?2). As expected, it is found that all of these sources possess significantly steeper spectra below 1 keV, than that observed at higher X-ray energies. In addition we find evidence for soft X-ray spectral features, which are best parameterized as line emission at 0.63 keV in NGC7469 and 0.75 keV in ESO198-G24. We examine these results in the light of the accuracy of the PSPC spectral calibration. |
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