This study investigates periodic modulation of the light curve of the RRc star TV Boo and its physical parameters based on photometric data .
This phenomenon , known as Blazhko effect , is quite rare among RRc stars .
Frequency analysis based on the data gathered at Masaryk University Observatory ( MUO ) and also using SuperWASP data revealed symmetrically structured peaks around the main pulsation frequency and its harmonics , which indicate two modulation components of the Blazhko period .
The main modulation periodicity was found to be 9.7374 \pm 0.0054 Â d. This is one of the shortest known Blazhko periods among RRc stars .
The second modulation period ( 21.5 \pm 0.2 Â d ) causes changes of the Blazhko effect itself .
Some indices show that TV Boo could be affected by long-term changes in the order of years .
Basic physical parameters were estimated via a MUO V light curve solution using Fourier parameters .
TV Boo seems to be a low-metalicity star with \mathrm { [ Fe / H ] } = -1.89 .