Researcher: Elijah Halliwell

Observations suggest that NSVS 801195 is an eclipsing variable star of W Ursae Majoris type. This star is located at α=11:00:53.94 δ=+75:33:11.26 and has the following alternate stellar designations: [GGM2006] 827464, 2MASS J11005394+7533113, Gaia DR2 1080133907863717248.  Star field with the target star and comparison stars used in ensemble differential photometry are shown in Figure 1. (Not available at moment).

We have observed this star with the Ball State University Observatory (BSUO) 20-inch (0.5m) telescope in the Johnson B (B) & V (V), and Cousins R (Rc) bandpasses. All stellar photometry is performed by the AstroImageJ (AIJ) software package. All photometry is performed with similar ensemble stars. If a calibrated magnitude for a comparison star is known, then it is used by AIJ to calibrate the magnitude for the target star. Folded light curves for Johnson V and (B-V) color are shown in Figure 2.

Best fitting Wilson-Devinney (WD) Models

All modeling is performed using the PHysics Of Eclipsing BinariEs (PHOEBE) (v0.31a) software package. PHOEBE is a graphical user interface (gui) to the WD code that is used to model binary stars. Figure 3 shows the best fit WD model with two star spots included. Figure 4 shows a graphical representation of the stellar surface.


Poster presentations and talks given at national, regional and local conferences for NSVS 254037 are given below.

  1. Mr. Elijah Halliwell

Contact Information

All members of the Variable Star Research group are enthusiastic researchers with a passion for the work performed by the group. We are always happy to discuss any research projects and are always looking for like-minded and enthusiastic collaborators. For more information regarding any of the aforementioned research activities or the research activities of the Variable Star Research Group, please do not hesitate to contact Robert Berrington.