We report on 0.3–10 keV observations with the Chandra X-ray Observatory of eight hard X-ray sources discovered within 8 ^ { \circ } of the Galactic plane by the INTEGRAL satellite .
The short ( \sim 5 ks ) Chandra observations of the IGR source fields have yielded very likely identifications of X-ray counterparts for three of the IGR sources : IGR J14091–6108 , IGR J18088–2741 , and IGR J18381–0924 .
The first two have very hard spectra in the Chandra band that can be described by a power-law with photon indices of \Gamma = 0.6 \pm 0.4 and – 0.7 ^ { +0.4 } _ { -0.3 } , respectively ( 90 % confidence errors are given ) , and both have a unique near-IR counterpart consistent with the Chandra position .
IGR J14091–6108 also displays a strong iron line and a relatively low X-ray luminosity , and we argue that the most likely source type is a Cataclysmic Variable ( CV ) , although we do not completely rule out the possibility of a High Mass X-ray Binary .
IGR J18088–2741 has an optical counterpart with a previously measured 6.84 hr periodicity , which may be the binary orbital period .
We also detect five cycles of a possible 800–950 s period in the Chandra light curve , which may be the compact object spin period .
We suggest that IGR J18088–2741 is also most likely a CV .
For IGR J18381–0924 , the spectrum is intrinsically softer with \Gamma = 1.5 ^ { +0.5 } _ { -0.4 } , and it is moderately absorbed , N _ { H } = ( 4 \pm 1 ) \times 10 ^ { 22 } cm ^ { -2 } .
There are two near-IR sources consistent with the Chandra position , and they are both classified as galaxies , making it likely that IGR J18381–0924 is an Active Galactic Nucleus ( AGN ) .
For the other five IGR sources , we provide lists of nearby Chandra sources , which may be used along with further observations to identify the correct counterparts , and we discuss the implications of the low inferred Chandra count rates for these five sources .