Active Galactic Nuclei:  Then Again
* From earlier proportional counter
observations, Seyfert 2 galaxies were
found to be much more highly absorbed
than Seyfert 1s, but not much else was
known about the details of their spectral
complexity.
* The prototype object in this class was
observed with BBXRT and found to
exhibit discrete residuals, but the
spectrum proved difficult to interpret.
Marshall claimed a significant
underabundance of oxygen.
* ASCA provided a much higher quality
spectrum, exhibiting narrow Fe K
emission, and a host of lower energy
features.
* Ueno interpreted this in terms of a
power law continuum, with an
additional thermal component at low
energies due to starburst activity.
Ueno et al., 1994, PASJ, 46, L71.