Evidence for an ionised disc in the narrow-line Seyfert 1 galaxy Ark 564

S. Vaughan, K. A. Pounds, J. Reeves +2

We present simultaneous ASCA and RXTE observations of Ark 564, the brightest known ``narrow-line'' Seyfert 1 in the 2-10 keV band. The measured X-ray spectrum is dominated by a ste…