(Credit: figure and text courtesy of P. Nandra)
The X-ray spectrum of the PG 1634+706 (z=1.084), as observed with the ASCA
SIS detectors. Unlike lower-redshift Seyfert 1 galaxies, this quasar shows
no evidence for iron K-alpha fluorescence. This may be related to the high
luminosity of the source, which might indicate a high accretion rate, and
therefore an ionized accretion disk.
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Last modified: Thursday, 26-Jun-2003 13:48:46 EDT
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