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We present the first X-ray observations of the eclipsing cataclysmicvariables Lanning 386 and MASTER OTJ192328.22+612413.5, possible SW Sextantissystems. The X-ray light curve of Lanning 386 shows deep eclipses, similar tothe eclipses seen in the optical light curve, confirming the high inclinationof the system. There is evidence of a periodicity between 17-22 min in theX-ray and optical light curves of Lanning 386, which is associated withquasi-periodic oscillations. This system also displays a hard X-ray spectrumwhich is well fit by a partially covered, absorbed 2 temperature plasma. Thecool plasma temperature (0.24$^{+0.17}_{-0.08}$ keV) and hot plasma temperature(9$^{+4}_{-2}$ keV) are not atypical plasma temperatures of known intermediatepolar systems. Based on this model, we suggest that Lanning 386 is anintermediate polar with a high accretion rate. The hot plasma temperaturelimits the white dwarf mass to $>$0.5 M$_{\odot}$. From the optical spectrumobtained using the Large Binocular Telescope, we find that the secondary in thesystem is consistent with an M5V star, and refine the distance to Lanning 386to be 160$\pm$50 pc. Finally, we use the high time resolution of the opticalspectra to crudely constrain the magnetic moment of the white dwarf in Lanning386. J1923 was not detected during the observations, but the upper limit on theflux is inline with J1923 and Lanning 386 being related.

XMM-Newton Observations of the Peculiar Cataclysmic Variable Lanning 386: X-ray evidence for a Magnetic Primary