Results are presented for XMM-Newton observations of five hard X-ray sources discovered by INTEGRAL in the direction of the Scutum Arm .
Each source received \gtrsim 20 ks of effective exposure time .
We provide refined X-ray positions for all 5 targets enabling us to pinpoint the most likely counterpart in optical/infrared archives .
Spectral and timing information ( much of which are provided for the first time ) allow us to give a firm classification for ( catalog IGR~J18462 $ - $ 0223 ) and to offer tentative classifications for the others .
For ( catalog IGR~J18462 $ - $ 0223 ) , we discovered a coherent pulsation period of 997 \pm 1 s which we attribute to the spin of a neutron star in a highly-obscured ( N _ { \mathrm { H } } = 2 \times 10 ^ { 23 } cm ^ { -2 } ) high-mass X-ray binary ( HMXB ) .
This makes ( catalog IGR~J18462 $ - $ 0223 ) the seventh supergiant fast X-ray transient ( SFXT ) candidate with a confirmed pulsation period . ( catalog IGR~J18457 $ + $ 0244 ) is a highly-absorbed ( N _ { \mathrm { H } } = 8 \times 10 ^ { 23 } cm ^ { -2 } ) source in which the possible detection of an iron line suggests an active galactic nucleus ( AGN ) of type Sey-2 situated at z = 0.07 ( 1 ) .
A periodic signal at 4.4 ks could be a quasi-periodic oscillation which would make ( catalog IGR~J18457 $ + $ 0244 ) one of a handful of AGN in which such features have been claimed , but a slowly-rotating neutron star in an HMXB can not be ruled out . ( catalog IGR~J18482 $ + $ 0049 ) represents a new obscured HMXB candidate with N _ { \mathrm { H } } = 4 \times 10 ^ { 23 } cm ^ { -2 } .
We tentatively propose that ( catalog IGR~J18532 $ + $ 0416 ) is either an AGN or a pulsar in an HMXB system .
The X-ray spectral properties of ( catalog IGR~J18538 $ - $ 0102 ) are consistent with the AGN classification that has been proposed for this source .