Abstract
We propose to observe a gamma-ray millisecond pulsar (MSP) candidate, 2FGL J2339.6-0532, to search for the first ``radio-quiet'' gamma-ray emitting MSP in a binary. The Fermi source has a candidate X-ray counterpart from Chandra data and its X-ray and gamma-ray properties are consistent with known gamma-ray pulsars. The source is also found to have a 4.53-hr orbital period in X-ray and optical data. We propose to use the timing mode of XMM-Newton to search for millisecond pulsation. Moreover, the high quality energy spectra will allow us to study the spectral properties and phase resolved spectra to constrain the system geometry.