We present the X-ray source catalog for the Chandra monitoring observations of the elliptical galaxy , NGC 4649 .
The galaxy has been observed with Chandra ACIS-S3 in six separate pointings , reaching a total exposure of 299 ks .
There are 501 X-ray sources detected in the 0.3–8.0 keV band in the merged observation or in one of the six individual observations ; 399 sources are located within the D _ { 25 } ellipse .
The observed 0.3–8.0 keV luminosities of these 501 sources range from 9.3 \times 10 ^ { 36 } erg s ^ { -1 } to 5.4 \times 10 ^ { 39 } erg s ^ { -1 } .
The 90 % detection completeness limit within the D _ { 25 } ellipse is 5.5 \times 10 ^ { 37 } erg s ^ { -1 } .
Based on the surface density of background active galactic nuclei ( AGNs ) and detection completeness , we expect \approx 45 background AGNs among the catalog sources ( \approx 15 within the D _ { 25 } ellipse ) .
There are nine sources with luminosities greater than 10 ^ { 39 } erg s ^ { -1 } , which are candidates for ultraluminous X-ray sources .
The nuclear source of NGC 4649 is a low-luminosity AGN , with an intrinsic 2.0–8.0 keV X-ray luminosity of 1.5 \times 10 ^ { 38 } erg s ^ { -1 } .
The X-ray colors suggest that the majority of the catalog sources are low-mass X-ray binaries ( LMXBs ) .
We find that 164 of the 501 X-ray sources show long-term variability , indicating that they are accreting compact objects .
We discover four transient candidates and another four potential transients .
We also identify 173 X-ray sources ( 141 within the D _ { 25 } ellipse ) that are associated with globular clusters ( GCs ) based on Hubble Space Telescope and ground-based data ; these LMXBs tend to be hosted by red GCs .
Although NGC 4649 has a much larger population of X-ray sources than the structurally similar early-type galaxies , NGC 3379 and NGC 4278 , yet the X-ray source properties are comparable in all three systems .