EXOSAT observations of the spectrum of the Seyfert 1 galaxy MKN 841 show that it is well-fitted by a power law of photon index 1.6, similar to that of other Seyferts, and a large additional soft component. The X-ray luminosity over the observed band exceeds |4×10⁴⁴\,erg\,s⁻¹|. A single-temperature blackbody fit to the soft X-rays and the short-wavelength ultraviolet continuum gives a luminosity of |2×10⁴⁶\,erg\,s⁻¹| while an accretion disc spectrum fitted to the same points gives a luminosity of |4.3×10⁴⁵\,erg\,s⁻¹|. The flux measured by both the EXOSAT low- and medium-energy instruments exhibits 12 per cent amplitude variability on a time-scale of one day.
No takes yet. Share an insight, caveat, or question.
Arnaud et al. (1985) studied this question.