A period analysis of CCD unfiltered photometry of V4745 Sgr ( Nova Sgr 2003 # 1 ) performed during 23 nights in the years 2003 – 2005 is presented .
The photometric data are modulated with a period of 0.20782 \pm 0.00003 ~ { } d ( 4.98768 \pm 0.00072 ~ { } h ) .
Following the shape of the phased light curve and the presence of the periodicity in all data sets with no apparent change in its value , we interpret this periodicity as orbital in nature and this is consistent with a cataclysmic variable above the period gap .
We found a probable short-term periodicity of 0.017238 \pm 0.000037 ~ { } d ( 24.82272 \pm 0.05328 ~ { } m ) which we interpret as the probable spin period of the white dwarf or the beat period between the orbital and spin period .
Therefore , we propose that nova V4745 Sgr should be classified as an intermediate polar candidate , supporting the proposed link between transition-oscillation novae and intermediate polars .
The mass-period relation for cataclysmic variables yields a secondary mass of about 0.52 \pm 0.05 ~ { } M _ { \odot } .