Discovery of a Compact X-Ray Object with a 614 s Periodicity in the Direction of the Galactic Center

Abstract We report on analysis of X-ray, optical, and radio observations the previously overlooked X-ray source 2CXO J174517.0–321356 located just 3.°2 away from Galactic center. Timing with XMM-Newton reveals periodic pulsations periods 1228 614 s, latter being tentatively considered fundamental. On other hand, an observation object NuSTAR a hard thermal-bremsstrahlung spectrum. Inspection archival Very Large Telescope image reveals, however, no obvious optical counterpart down to R > 25 mag. Observations made ATCA showed possible faint positive spectral index ( α 0.51) between 1 3 GHz, but follow-up Array at frequencies 4.5–10 GHz 3–22 respectively, could not detect it. Given properties in these three bands, we argue that most likely origin is emission new intermediate polar close Alternatively, less likely, it ultracompact binary, which one compact binaries.