We present the result of the Chandra high-resolution observation of the Seyfert 2 galaxy NGC 7590 .
This object was reported to show no X-ray absorption in the low-spatial resolution ASCA data .
The XMM-Newton observations show that the X-ray emission of NGC 7590 is dominated by an off-nuclear ultra-luminous X-ray source ( ULX ) and an extended emission from the host galaxy , and the nucleus is rather weak , likely hosting a Compton-thick AGN .
Our recent Chandra observation of NGC 7590 enables to remove the X-ray contamination from the ULX and the extended component effectively .
The nuclear source remains undetected at \sim 4 \times 10 ^ { -15 } { erg cm ^ { -2 } s ^ { -1 } } flux level .
Although not detected , Chandra data gives a 2–10 keV flux upper limit of \sim 6.1 \times 10 ^ { -15 } { erg cm ^ { -2 } s ^ { -1 } } ( at 3 \sigma level ) , a factor of 3 less than the XMM-Newton value , strongly supporting the Compton-thick nature of the nucleus .
In addition , we detected five off-nuclear X-ray point sources within the galaxy D _ { 25 } ellipse , all with 2 – 10 keV luminosity above 2 \times 10 ^ { 38 } { erg s ^ { -1 } } ( assuming the distance of NGC 7590 ) .
Particularly , the ULX previously identified by ROSAT data is resolved by Chandra into two distinct X-ray sources .
Our analysis highlights the importance of high spatial resolution images in discovering and studying ULXs .