Observations of the quasar PG 1211+ 143 are presented and its continuum is modelled in
terms of an accretion disk and an underlying power law. The X-ray spectrum in the Einstein
imaging proportional counter band is well described by a power law with the very steep
spectral index 2.2+ or-0.4. The overall continuum spectral energy distribution can be
described as a power law with alpha roughly 1.2 from the infrared to about 1 keV, with the
optical, ultraviolet, and soft X-rays forming a large excess above this power law. If the soft X …

We present observations of the spectrum of the bright, nearby quasar PG 1211+ 143. The X-
ray spectrum of this object in the Einstein IPC band can be described by a power law with
the unusually steep spectral index of a= 22 t 04. There is evidence from the MPC detection
that the X-ray spectrum flattens to a, 5 1.2 for energies above 2 keV. The overall continuum
spectral energy distribution can be described by a power law of a= 1.25 extendeing from 10
pm to 2 keV, with the optical, UV, and soft X-rays forming a large excess above this power …