CzeV1731 times of eclipses and radial velocities

This is the third known system of its kind, in which the masses are determined for all four stars and both the inner and outer orbits are characterized. The inner eclipsing binaries are well-detached systems moving on circular orbits: pair A with period P_A_=4.10843d and pair B with P_B_=4.67552d.

The inner binaries contain very similar components (q~1.0), making the whole system a so-called double twin. The stars in pair B have slightly larger luminosities and masses and pair A shows deeper eclipses. All four components are main-sequence stars of F/G spectral type.