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The two objects 1SWASP J150822.80-054236.9 and 1SWASP J160156.04+202821.6were initially detected from their SuperWASP archived light curves as candidateeclipsing binaries with periods close to the short-period cut-off of theorbital period distribution of main sequence binaries, at ~0.2 d. Here, usingINT spectroscopic data, we confirm them as double-lined spectroscopic andeclipsing binaries, in contact configuration. Following modelling of theirvisual light curves and radial velocity curves, we determine their componentand system parameters to precisions between ~2 and 11%. The former systemcontains 1.07 and 0.55 M_sun components, with radii of 0.90 and 0.68 R_sunrespectively; its primary exhibits pulsations with period 1/6 the orbitalperiod of the system. The latter contains 0.86 and 0.57 M_sun components, withradii of 0.75 and 0.63R_sun respectively.

Parameters of two low-mass contact eclipsing binaries near the short-period limit