V1344 Aql orbit parameters and spectra

Therefore a thorough study of individual Cepheids belonging to binary systems is necessary. Our aim is to determine the orbit of the binary system V1344 Aql using newly observed and earlier published spectroscopic and photometric data.

We collected new radial velocity observations using medium resolution (R~11000 and R~<20000) spectrographs and we updated the pulsation period of the Cepheid based on available photometric observations using O-C diagram. Separating the pulsational and orbital radial velocity variations for each observational season (year), we determined the orbital solution for the system using chi^2^ minimisation. The updated pulsation period of the Cepheid estimated for the epoch of HJD 2458955.83 is 7.476826 days.