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Paper: Multisite Spectroscopic and Photometric Observations of the Pulsating sdB Star PG 1605+072
Volume: 310, Variable Stars in the Local Group (IAU Colloquium 193)
Page: 230
Authors: O'Toole, S.J.; Falter, S.; Heber, U.; Jeffery, C.S.; Dreizler, S.; Schuh, S.L.; MSST Team, the; WET Teams, the
Abstract: We present the first results from the MultiSite Spectroscopic Telescope (MSST) observations ofthe sd BV star PG 1605+072. Pulsating sdB stars (V361 Hya stars) offer the chance to gain new insights into the formation and evolution of extreme Horizontal Branch stars using the tools of asteroseismology. PG 1605+072 is an outstanding object in its class, with the richest frequency spectrum, the longest periods, and the largest variations. The MSST campaign took place in 2002 May/June and we present here the massive data set, madeup of 399 hr of photometry and 151 hr of spectroscopy. The overall aims of the project are to examine light/velocity amplitude ratios and phase differences, changes in equivalent width/line index, and λ-dependence of photometric amplitudes, and to use these properties for mode identification.
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