  The distribution of hot interstellar medium in early-type galaxies bears the
imprint of the various astrophysical processes it underwent during its
evolution. The X-ray observations of these galaxies have identified various
structural features related to AGN and stellar feedback and environmental
effects such as merging and sloshing. In our XMM-Newton Galaxy Atlas (NGA)
project, we analyze archival observations of 38 ETGs, utilizing the high
sensitivity and large field of view of XMM-Newton to construct spatially
resolved 2D spectral maps of the hot gas halos. To illustrate our NGA data
products in conjunction with the Chandra Galaxy Atlas (Kim et al. 2019), we
describe two distinct galaxies - NGC 4636 and NGC 1550, in detail. We discuss
their evolutionary history with a particular focus on the asymmetric
distribution of metal-enriched, low-entropy gas caused by sloshing and AGN-
driven uplift. We will release the NGA data products to a dedicated website,
which users can download to perform further analyses.
