AAS 205th Meeting, 9-13 January 2005
Session 18 Eclipsing Binaries and Contact Binaries
Poster, Monday, January 10, 2005, 9:20am-6:30pm, Exhibit Hall

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[18.06] Analysis of the eclipsing binary V1128 Tauri

N. C. Hawkins, R. G. Samec (Bob Jones University), W. Van Hamme (Florida International University), D. R. Faulkner (University of S. Carolina, Lancaster)

We present a periodicity and preliminary light analysis of V1128 Tauri [HIP 17878, GSC 664 694, \alpha(2000) = 03h 49m 27.8s, \delta(2000) = +12\degr 54' 44"]. The observations were taken from 24 - 27 December 2003, by RGS, DRF, and NCH with the Southeastern Association for Research in Astronomy (SARA) 0.9-m reflector and AP7 CCD at Kitt Peak. Standard UBVRcIc filters were used. Between 70 and 100 observations were taken in each pass band. Mean epochs of minimum light for two secondary eclipses, HJD = 2452998.6636(12) and 2453000.8048(7) as well as one primary eclipse, 2453000.6524(3) were determined using quadratic fits. We calculated the following ephemeris from all available timings of minimum light:

J.D. Hel Min I = 2453000.6526 (2) + 0.30537315 (6) d*E

V1128 Tau is a near contact or shallow contact solar-type binary. The eclipse depths are slightly unequal; the amplitudes in V are 0.74 mag and 0.70 mag. The slight difference in the maxima gives evidence of some spot activity. A Wilson-Devinney code solution is presented.

We wish to thank SARA for their allocation of observing time, and the grant from NASA administered by the American Astronomical Society.

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Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.