Optical Observations of the High Mass X-ray Binary 4U 2206+54

Astronomy and Astrophysics – Astronomy

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Scientific paper

During the summers of 2008 and 2009, we obtained optical observations of the High Mass X-ray Binary (HMXB) 4U 2206+54. Time-series observations were obtained using the 0.4-m David Derrick Telescope at the BYU Orson Pratt Observatory and with the 0.3-m and 0.5-m telescopes of the BYU West Mountain Observatory (WMO). A total of 19 nights were obtained in 2008 and 36 nights in 2009 of time series observations in the V filter. We will also report on additional data obtained around the H-alpha line. Spectral data was obtained with the DAO 1.2-m telescope and photometric data with the new WMO 0.9-m telescope. We will discuss the optical periodicity found in the system and how this might relate to the orbital period. Finally we will report on plans to monitor 4U 2206+54 in the radio wavelengths. Since the delta Scuti variable GSC 03973-01698 is contained in all our CCD frames we will include a short analysis of this target as well.

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