Office: JH 310K
Phone: (402) 472-2788

Research Interests:

I am conducting variable star observations with the .76 m telescope at Behlen Observatory. A large photometric survey of poorly studied variable stars which has been under way for about seven years is continuing. Approximately 400 stars have been observed so far. Additionally, more detailed observations are being made of individual stars found to be of special interest in the survey.

I am also analyzing ultraviolet images obtained by colleagues at the Naval Research Laboratory using electronographic cameras which are flown on various satellites. The goal is to obtain accurate ultraviolet photometry of stars which will be applied to studies of interstellar absorption and the properties of hot stars.


George Carruthers, Naval Research Laboratory
Todd Young, Wayne State College (Wayne, Nebraska)
Kevin Lee, University of Nebraska-Lincoln

Current Research Projects

  • Study of the peculiar RR Lyrae Star V442 Her.
  • Analysis of ultraviolet images of star fields.
  • Study of light curve anomalies among long period RR Lyrae stars.

Recent Results

It has been found that the RR Lyrae star V442 Her undergoes very large changes in its amplitude of variation over a period of nearly 900 days. The size of the amplitude modulation and its long period appear to be unique to this star.

Recent Publications

"Far-Ultraviolet Stellar Photometry: Fields Centered on Rho Ophiuchi and the Galactic Center," E.G. Schmidt and G.R. Carruthers, 1996, Astronomical Journal 104, 101.

"Stars Classified as Constant in the General Catalogue of Variable Stars II," E.G. Schmidt, 1996, Publications of the Astronomical Society of the Pacific 108, 105.

"The Behlen Observatory Variable Star Survey IV," E.G. Schmidt and A. Seth, 1996, Astronomical Journal 112, 2769.

"Photometric Study of Selected Zero-age Contact and Evolved Binary Systems," S.N. Goderya, K.C. Leung, and E.G. Schmidt, 1997, in The Third Pacific Rim Conference on Recent Development in Binary Star Research, p. 219.

"A Photometric Study of the Short Period Eclipsing Binary Star V719 Her," S.N. Goderya, K.-C. Leung, and E.G. Schmidt, 1996, Astrophys. and Space Science 243, 315.

"Photometric Investigation of the Evolved Contact Binary System DN Aur," S.N. Goderya, K.-C. Leung, and E.G. Schmidt, 1997, Astrophys. and Space Science 246, 291.

"The Noah Project: Detection of the Spin-Orbit Beat Period of BY Camelopardalis," A.D. Silber, P. Szkody, D.W. Hoard, M. Hammrgren, J. Morgan, E. Fierce, K. Olsen, P.A. Mason, R. Rolleston, R. Routsalainen, E.P. Pavlenko, M. Nickolay, S. Shugarov, I.L. Andronov, S.V. Kolesnikov, T. Naylor, and E.G. Schmidt, 1997, MNRAS 290, 25S.

"Light Curve Changes in the Eclipsing Binary V719 Her," E.G. Schmidt, 1998, The IAU Information Bulletin on Variable Stars, No. 4552.

"Photometric Investigation of the Eclipsing Binary KN Per," S.N. Goderya, K.-C. Leung, and E.G. Schmidt, 1998, Astronomy and Space Science 254, 295.