  We present an analysis of EUV and soft X-ray emission detected toward Comet
Lovejoy (C/2011 W3) during its post-perihelion traverse of the solar corona on
December 16, 2011. Observations were recorded by the Atmospheric Imaging
Assembly (AIA) aboard the Solar Dynamics Observatory and the X-Ray Telescope
(XRT) aboard Hinode. A single set of contemporaneous images is explored in
detail, along with prefatory consideration for time evolution using only the
171 A data. For each of the eight passbands, we characterize the emission and
derive outgassing rates where applicable. As material sublimates from the
nucleus and is immersed in coronal plasma, it rapidly ionizes through charge
states seldom seen in this environment. The AIA data show four stages of oxygen
ionization (O III - O VI) along with C IV, while XRT likely captured emission
from O VII, a line typical of the corona. With a nucleus of at least several
hundred meters upon approach to a perihelion that brought the comet to within
0.2 solar radii of the photosphere, Lovejoy was the most significant sungrazer
in recent history. Correspondingly high outgassing rates on the order of
10^32.5 oxygen atoms per second are estimated. Assuming that the neutral oxygen
comes from water, this translates to a mass-loss rate of about 9.5E9 g/s, and
based only on the 171 A observations, we find a total mass loss of
approximately 10^13 g over the AIA egress. Additional and supporting analyses
include a differential emission measure to characterize the coronal
environment, consideration for the opening angle, and a comparison of the
emission's leading edge with the expected position of the nucleus.
