We present observations of extended , 20-kpc scale soft X-ray gas around a luminous obscured quasar hosted by an ultra-luminous infrared galaxy caught in the midst of a major merger .
The extended X-ray emission is well fit as a thermal gas with a temperature of kT \approx 280 eV and a luminosity of L _ { X } \approx 10 ^ { 42 } erg s ^ { -1 } and is spatially coincident with a known ionized gas outflow .
Based on the X-ray luminosity , a factor of \sim 10 fainter than the [ O iii ] emission , we conclude that the X-ray emission is either dominated by photoionization , or by shocked emission from cloud surfaces in a hot quasar-driven wind .