Multiple temperature components of the hot circumgalactic medium of the
  Milky Way
  We present a deep XMM-Newton observation of the Galactic halo emission in the
direction of the blazar 1ES 1553+113. In order to extract the Galactic halo
component from the diffuse soft X-ray emission spectrum, accurately modeling
the foreground components is crucial. Here we present complex modeling of the
foregrounds with unprecedented details. A careful analysis of the spectrum
yields two temperature components of the halo gas (T$^{em}_1$=
10$^{6.25-6.42}$K, T$^{em}_2$= 10$^{6.68-6.92}$K). We find that these
temperatures obtained from the emission spectrum are not consistent with those
from the absorption spectrum (T$^{ab}_1$= 10$^{6.07-6.13}$K, T$^{ab}_2$=
10$^{6.96-7.15}$K), unlike the previous studies that found only one temperature
component of the Milky Way circumgalactic medium. This provides us with
interesting insights into the nature of emitting and absorbing systems. We
discuss several possibilities objectively, and conclude that most likely we are
observing multiple (3 to 4) discrete temperatures between 10$^{5.5}$K and
$\geqslant$10$^7$K in the Milky Way circumgalactic medium.
