MATHEMATICAL MODELING OF THE PHOTOMETRIC VARIABILITY OF THREE NEWLY DISCOVERED VARIABLE STARS

Ivan Andronov, Natalia Virnina
unpublished
Variability of three stars in the field of the asynchronous polar CI Ind was discovered by Golovin et al. (2009, OEJ V, http://var.astro.cz/oejv/) and the photometric time series were published on-line with this article. Results of the trigonometric polynomial fits are presented, which allow to determine photometric parameters needed for the General Catalogue of Variable Stars (http://www.sai.msu.su/' groups/cluster/gcvs/gcvs/). For the statistically optimal modeling, the program FDCN
more » ... 1994, OAP 9,49) was used. Two stars USNO-B1.0 0309-0775167 and USNO-B1.0 0315-0775167 are classified as EW-type eclipsing binaries. For both, the statistically optimal degree of the trigonometric polynomial is s=2. The corresponding initial epochs (2454828.7662-0.0015,2454828.4509-0.0013 for the minimum), periods P (0.317240-0.000056, 0.232574-0.000038), maximum brightness (14.673-0.005, 15.969-0.012), minimum brightness (14.766-0.003, 16.237-0.014), amplitudes (0.094-0.003, 0.268-0.015) are determined. The remaining star USNO-B1.0 0311-0760061 is a RRc-type variable with corresponding elements s=3, 2454828.6079-0.0033 (maximum), P=0.211807-0.000014, 13.874-0.004, 14.154-0.004, 0.281-0.005, asymmetry 0.377-0.018.
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